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Dermatological Modifications in the Feet of People with Diabetes Mellitus that are Being Monitored in Primary Care

Vívian Saraiva Veras1, Maria Girlane Sousa Albuquerque Brandão1*, Anne Caroline Ferreira Queiroga1, Dyana Mirelle Cunha Santos Pinheiro1, Luciana Catunda Gomes De Menezes2 and Thiago Moura De Araújo1

1Universidade da Integracao Internacional da Lusofonia Afro-Brasileira, Ceara, Brazil

2Faculdade Metropolitana da Grande Fortaleza, Ceara, Brazil

*Corresponding Author:
Maria Girlane Sousa Albuquerque Brandao
Universidade da Integracao Internacional da Lusofonia Afro-Brasileira
15 Jose Joaquim da Silva St., Redenacao, Brazil
Zip Code: 62790000
Tel: +5588996516914
E-mail: [email protected]

Received Date: 03/11/2019; Accepted Date: 06/01/2020; Published Date: 10/01/2020

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Objective: To identify dermatological changes in the feet of people with diabetes mellitus that are being monitored in Primary Care. Materials and methods: Epidemiological study accomplished in the countryside of Ceará, Brazil, with 135 people with diabetes. For the data gathering, interviews, evaluation of medical handbooks and physical examination of the feet for the identification of dermatological changes were performed. Fisher’s test was used, with a confidence level of 95% and a significance level of 5%. Results: There was a predominance of cracks, decreased/ absent hair growth, xeroderma, onychomycosis, peeling, and calluses. Regarding the clinical evaluation and the plantar sensitivity of the feet, there was evidence of a decrease in the dorsalis pedis and posterior tibial pulses, in addition to changes in the plantar sensitivity and the vibration sensitivity of both feet. Conclusion: One needs to develop educational activities that support the practice of physical activities, empowerment, selfcare and a periodic evaluation of the feet in Primary Care.


Primary Health Care, Type 2 Diabetes Mellitus, Diabetic foot, Primary prevention


Dermatological modifications are characterized by changes in the functionality and integrity of muscles, bones, joints, nerves or tendons, that get worse in the presence of pain or chronic diseases [1]. Some dermatological modifications in the feet may be common in people with diabetes mellitus (DM), such as mycosis in fingernails and finger joints, calluses, cracks, dry skin, presence of bubbles or erythema, which contributes for the appearance of the diabetic foot [2].

The overall prevalence of diabetic foot is an average of 6.4%. In Brazil, the prevalence is 4% to 10% [3]. People with diabetic foot exhibit high rates of amputation, with a risk 25 times higher when compared to healthy people [4].

The diabetic foot is responsible for 40% to 70% of non-traumatic amputations in lower limbs, where 85% are preceded by an ulcer that could be avoided with the periodic tracking of dermatological modifications, thus generating elevated costs to the Public health System (SUS). The estimated average annual cost for the ambulatory treatment of a person with diabetic foot is of R$ 600.44 ( ± R$ 183) [4].

Therefore, the vulnerability of people with DM related to dermatological modifications in the feet increases the risk of diabetic foot and amputations, which highlights the need for comprehension and knowledge of this complex process by the multi-professional team [5].

The Primary Care has a vital role in the tracking of dermatological modifications because it is the main entrance to the public health system and also the space to answer the necessities of people, families and the community, with the communication of promotion, prevention and recovery of health to ensure care’s integrality.

A thorough assessment of dermatological modifications of the feet during the nursing consultation is a fundamental stage in the tracking and prevention of diabetic foot and amputations [6]. It is also Worth it to highlight the importance of pharmacological therapy and new therapeutic molecules used in the treatment and control of DM [7-9].

As an important member of the Primary Care team, the nurse has a vital role in the care of people with DM and must be aware to dermatological modifications that may unleash complications and must also develop strategies of education in health, collective and individual interventions, continuous monitoring of glycemic control and periodic clinical exams of the feet.

Therefore, the study becomes relevant for emphasizing the importance in tracking and identification of dermatological modifications as a strategy to prevent complications in the feet of people with DM, thus enabling the early identification of risk factors, to open ways for the reflection about the improvement of care among these clientele and to contribute with the therapeutic success, to avoid future complications.

The study has the objective of identifying dermatological modification in the feet of people with diabetes mellitus that are being monitored in Primary Care.

Material and Methods

Epidemiological, descriptive and transversal study, with a quantitative approach and focus in dermatological modifications in the feet of people with DM for the prevention of diabetic foot, developed in a Primary Care Unit (PCU) from a city in the Region of Maciço de Baturité, Ceará, Brazil, from March to December 2018.

The convenience sample was made of 135 participants that fulfilled the inclusion conditions: people with DM and one or more risk behaviour ’ s for ulcers in the feet, with the capability of hearing and verbally respond to formulated questions. People with DM and bilateral amputation of inferior members were excluded from the study.

The following situations were considered as Risk Conditions/behaviour ’ s: people with DM that had inadequate glycemic and metabolic control; last feet evaluation made over one year ago or people who had never made one; 10 years or more of DM’s diagnostic; smokers; use of inadequate shoes, history of ulcer in the feet or amputation of one of the inferior members.

The participants with risk conditions/behaviour were identified in their home by seven Community health agents (CHA). The CHA were previously trained by the research team to identify risk conditions/behaviour. When at least one risk behaviour is evidenced, the person with DM would receive the invitation to attend in the ICU at a previously scheduled day.

For the data gathering, the following actions were made: interviews, handbook’s evaluation and physical examination of the feet, to identify dermatological modifications. The interview’s script includes epidemiological-clinical data, such as sex, year of birth, education level, job occupation and time with DM. The following variables were considered in the dermatological evaluation of lower limbs: feet care (feet hygiene; fingernails cutting and type of shoes), dermatological evaluation (presence of cracks, excess of hair, xeroderma, onychomycosis, peeling, calluses, mycosis between finger joints, ingrown nail, hyperkeratosis, bubbles, ulcers) and palpation of the pulse in the feet and tibia in the evaluation of foot’s protective sensibility.

For the analysis, the data were organized in spreadsheets of the program Microsoft Office Excel 2016 and later transferred to the statistical program Epi Info™, version Fisher’s test was used, with a confidence level of 95% and a significance level of 5%.

The research was approved by the Committee of Ethics in Research (CEP) from Universidade da Integração Internacional da Lusofonia Afro-Brasileira, under-report nº 2.932.293/2018, followed the recommendation of the Resolution nº 466/12, from the National Health Council, and all participants signed the Term of Consent.


The research’s 135 participants showed an average age of 61.31 years old (±11.95), with the prevalence of females (75.56%) and elderly (57.78%). Regarding the job occupation, 37.78% were retired or pensioners. The average education level was of 6.7 (± 5.7) years of study (Table 1).

Age group n %
Elderly 78 57.78
Adult 57 42.22
Female 102 75.56
Male 33 24.44
Job occupation
Retired/Pensioner 51 37.78
Self-employed 30 22.22
Housekeeper 26 19.26
Employed person 24 17.78
Unemployed 4 2.96
Education level
Illiterate 25 18.52
Literate 25 18.52
Primary School 55 40.74
Secondary School 27 20
University education 6 4.44
Source: Study’s data, 2018.

Table 1. Sociodemographic profile of the study’s participants. Redenção, Ceará, 2019.

Regarding the type of DM, 41.45% has type 02 DM, however, most of them (54.81%) could not affirm their type of DM. There was a prevalence of people with DM for more than ten years (58.52%) and nonsmokers (55.56%). The practice of physical exercise was not a common habit among the participants (Table 2).

Type of diabetes  n %
Could not inform 74 54.81
Diabetes type 02 58 42.96
Diabetes type 01 3 2.22
Time with diabetes
< 10 years 79 58.52
≥ 10 years 56 41.48
Tobacco use    
No 75 55.56
Ex-smoker 50 37.04
Yes 10 7.41
Practice of physical exercise
No 82 60.74
Yes 53 39.26

Table 2. Clinical profile of the study’s participants. Redenção, Ceará, 2019.

Table 3 highlights data that identify risk factors for feet ulcerations, where there is the prevalence of participants that did not carry out adequate hygiene of their feet (83.55%) and 41.48% used inadequate shoes for people with DM. The fingernail cutting was adequate in most of the participants. However, one highlights the presence of dermatological modifications that compromise the feet integrity, with the prevalence of cracks, decreased/absent hair growth, xerosis, onychomycosis, peeling and calluses.

Feet hygiene n %
Inadequate 115 85.19
Adequate 20 14.81
Type of shoe
Adequate 79 58.52
Inadequate 56 41.48
Type of fingernail cutting
Adequate 70 51.85
Inadequate 56 41.48
Dermatological evaluation
Cracks 92 68.15
Decreases/absent hair growth 92 68.15
Xerosis 80 59.26
Onychomycosis 50 37.04
Peeling 46 34.07
Calluses 39 28.89
Mycosis between finger joints 24 17.78
Ingrown nail 21 15.56
Hyperkeratosis 12 8.89
Bubbles 3 2.22
Ulcers 3 2.22

Table 3. Dermatological evaluation of the study’s participants. Redenção, Ceará, 2019.

In clinical evaluation and feet sensibility, there was a prevalence of reduction of the pulse in the feet and posterior tibia, in addition to changes in the feet’s protective sensibility and vibratory sensibility of both feet (Table 4).

Variables Evaluation RF RF RF LF LF LF
(n= 135) (%) (IC 95%) (n=152) (%) (IC 95%)
Pulsation of the feet
Present 110 81.48  [73.8- 87.6] 106 78.52  [70.6-85.1]
Absent 5 3.7  [1.2-8.4] 3 2.22  [0.4-6.3]
Decreased 20 14.81  [9.2-21.9] 26 19.26  [12.8-26.2]
Pulsation of the posterior tibia
Present 114 84.4  [77.2-85.1] 110 81.4  [73.8-87.4]
Absent 1 0.74  [0.02-4.06] 2 1.48  [0.18-5.2]
Decreased 20 14.81  [9.2-21.9] 23 17.04  [11.1-24.4]
Feet’s protective sensibility
Normal 110 74.07  [65.8-81.2] 103 76.3  [68.2-83.1]
Changed 35 25.9  [18.7-34.1] 32 23.7  [16.8-31.7]
Tactile sensibility
Normal 127 94.07  [88.6-97.4] 129 95.3  [90.5-98.3]
Absent 3 2.22  [0.46-6.3] 3 2.22  [0.4-6.3]
Decreased 5 3.7  [1.2-8.4] 3 2.22  [0.4-6.3]
Achilles’ reflexes
Normal 127 94.07  [88.6-97.4] 123 91.1  [84.9-95.3]
Decreased 7 5.19  [2.1-10.3] 12 8.89  [4.6-15.01]
Absent 1 0.74  [0.02-4.06] - - -
Vibratory sensibility
Normal 78 57.78  [48.9-66.2] 78 57.78  [48.9-66.2]
Decreased 57 42.22  [33.7-51.02] 57 42.22  [33.7-51.02]
Sensibility for pain
Normal 122 90.37  [84.1-94.7] 128 94.1  [89.6-97.8]
Decreased 13 9.63  [5.2-15.9] 7 5.19  [2.1-10.3]
Thermal sensibility
Normal 122 90.3  [84.1-94.7] 115 85.19  [78.05-90.7]
Decreased 13 9.63  [5.2-15.9] 20 14.81  [9.2-21.9]

Table 4. Distribution of people with Diabetes Mellitus in the study, accordingly with parameter of clinical evaluation of the Right foot (RF) x Left foot (LF) and Feet sensibility. Redenção, Ceará, 2019.

In the comparison between time of DM and dermatological evaluation of the participants, there was a statistical significance in hyperkeratosis, cracks, onychomycosis and Ingrown nail (Table 5).

Variables Time with diabetes Statistic
≥ 10 years < 10 Years  [p-value]1
Present 21 [37.50] 25 [31.65] 0.299
Absent 35 [62.50] 54 [68.355]  
Present 09 [16.07] 03 [3.80] 0.015
Absent 47 [83.93] 76 [96.20]  
Mycosis between finger joints
Present 14 [25.00] 10 [12.66] 0.053
Absent 42 [75.00] 69 [87.34]  
Present 43 [76.79] 49 [62.03] 0.05
Absent 13 [23.21] 30 [37.97]  
Present 26 [46.43] 24 [30.38] 0.042
Absent 30 [53.57] 55 [69.62]  
Ingrown nail
Present 06 [31.6] 13 [68.4] 0.049
Absent 74 [55.6] 59 [44.4]  
Present 18 [32.14] 21 [26.58] 0.304
Absent 38 [67.86] 58 [73.42]  
Present 02 [3.57] 01 [1.27] 0.372
Absent 54 [96.43] 78 [98.73]  
Growth hair
Modified 40 [71.43] 52 [65.82] 0.309
Normal 16 [28.57] 27 [34.18]  
Skin’s moisture
Xeroderma 34 [60.71] 46 [58.23] 0.456
Normal 22 [39.29] 33 [41.77]  

Table 5. Comparison between time of DM and dermatological evaluation of the study’s participants, Redenção, Ceará, 2019.


The clinical epidemiological characteristics of the studied sample are similar to other national and international studies, especially concerning the age, education level, job occupation and diagnostic time [10,11].

In the current study, the absence of information about the type of DM was observed in more than 50% of the evaluated participants, even in individuals with more than 10 years of diagnostic. However, there is a prevalence of Type 2 DM (75.4%) in the research’s region [12] and also with a national highlight in the number of notified cases of type 1 and 2 of DM [13].

DM with more than 10 years is a relevant risk factor for feet complications [14]. This highlights the need for higher attention to this clientele because they are predisposed to a higher risk of developing dermatological modifications in the feet and to harm their quality of life.

Exercise was not a common habit among study participants. One survey found that 74% of people with dermatological foot modifications did not engage in any type of regular exercise [15]. However, physical exercise programs are recommended as a non-pharmacological treatment of diabetes due to its hypoglycemic effect [16].

Therefore, one perceives the importance of guiding people with DM to practice regular physical exercises, since the glycemic control is one of the factors that may help in the prevention of dermatological modifications in the feet.

The prevalence of participants that did not made an adequate hygiene of their feed associated with the use of inadequate shoes for people with DM, reveals itself as a risk factor for dermatological modifications in the feet, corroborating with the study of Gomes and Junior (2018) [10] where people with DM who had poor hygiene of their feet and used inadequate shoes had a higher risk of acquiring dermatological modifications in their feet.

The observation of hygiene and the guidance about the use of therapeutic shoes for people with DM is one of the most important factors that must be passed by the nurses to prevent dermatological modifications in lower members, since, inadequate shoes expose the feet to external trauma and may act as an unleashing factor in up to 85% of the cases of feet ulcers [17].

Consequently, the nurse must be always aware of the shoes used by people with DM in their daily routine, prioritizing safety and comfort, in addition to also highlight the importance of not waking barefoot to avoid trauma due to the reduction of sensibility [18].

The feet evaluation and self-care must be exhaustively advised to every person with DM, which must receive guidance and encouragement to adopt the habit of verifying their feet every day and to ask for the help of a health professional in case they find modifications such as cracks, calluses, fissures, maceration, bubbles, mycosis between finger joints, edema, hyperemia and onychomycosis.

The dermatological modifications that are most prevalent in this study were the cracks, decreased/absent hair growth, xeroderma, onychomycosis, peelings, and calluses.

In people with DM, the presence of these modifications reveals a higher risk of injuries that may evolve to amputations. The skin’s fragility associated with the loss of sensibility unleashes the appearance of injuries because the absence of pain prevents the individual to notice repetitive superficial traumas, such as cracks, calluses and peeling [19].

People with DM may also have the impairment of some sensitive, motor and autonomic fibers, which reduce the sweat in the feet, leaving them dry, thus predisposing the feet to cracks, calluses, and fissures. This maximizes the risk of dermatological injuries [20]. Therefore, one perceives that keeping their feet clean and hydrated may contribute to the prevention of feet injuries.

Regarding the neurological evaluation of the feet, these are at odds with other studies, where the modifications associated with sensibilities (sole of the feet, thermal, vibratory and tactile) did not surpass 10% [21,22].

When comparing the participants’ time with DM and the dermatological evaluation, there was a statistical significance in hyperkeratosis, cracks, onychomycosis and ingrown nails. People with type 2 DM and diagnostic time of over 10 years are more predisposed to developing dermatological modifications in their feet [23].

There was a prevalence of cracks, calluses, and mycosis in the feet of people with DM in the Brazilian field [2]. The onychomycosis was one of the common dermatological modifications in people with more than 10 years with DM in Brazil and Pakistan [24].

In most people with DM the formation of cracks, calluses and hyperkeratosis occurred due to the decrease of sweating, because it leaves the skin thin and dry [25]. This data highlights the importance of providing information to this clientele about the daily hydration of their feet to avoid this type of cutaneous modification.

The onychomycosis is mycosis that affects fingernails and is responsible for 15 to 40% of ungual diseases. They are considered as the hardest superficial mycosis to diagnose and treat, due to the density of the fingernails’ keratin and for being a poor region in blood vessels [26]. This reinforces the need of providing information to people with DM about the care with this modification that is very hard to treat and that may severely compromise the nails’ integrity.

The ulcers in lower members of people with DM may be avoided and stratification of risk factors, such as dermatological modifications is the first step for the reduction of the prevalence of diabetic foot and the amputation of lower members since it allows a more effective allocation of available resources for the prevention and treatment of this grievance [24].

Faced with this and considering the dermatological modifications, in addition to orientations, the nurse needs to use practical activities during individual or collective care, to ease the patient’s learning, thus showing the correct form of washing and drying the feet, how to cut their fingernails and how to hydrate the skin [2].

The nurse is an important professional in the team of Primary Care. He may, in a systematically way, promote the prevention of diabetic foot, via periodic feet evaluation, to identify and treat possible dermatological modifications, thus empowering people with DM with autonomy and self-care, which contributes for the reduction of complications and the improvement of their quality of life [27].


This study’s participants presented poor feet hygiene associated with the use of inadequate shoes for people with DM. In the identified dermatological modifications, there was a prevalence of cracks, decreased/absent hair growth, xeroderma, onychomycosis, peeling, and calluses, drawing the attention to the risk of the ulcers they may unleash. One infers the relevance of health professionals in association with a unique and qualified care to people with DM and the promotion of educative activities that encourages the practice of physical activities, empowerment, and self-care of the feet, along with a specialized attention for the prevention of complications via periodic evaluation of the feet in primary care.


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