Diabetes and skin manifestations
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Prevalence and Types of Skin Manifestations in Diabetes
Skin manifestations are very common in people with diabetes, affecting between 30% and 70% of patients during the course of the disease Vâță2023Duff2015Breznická2019+1 MORE. These skin changes can sometimes be the first sign of diabetes, even before the disease is diagnosed, or they may develop as the disease progresses Kutaj2025Vâță2023Duff2015+2 MORE. The most frequently reported skin conditions in diabetic patients include fungal and bacterial infections, xerosis (dry skin), diabetic dermopathy, acanthosis nigricans, necrobiosis lipoidica, and pruritus (itchy skin) Kutaj2025Vâță2023Duff2015+6 MORE.
Common Specific Skin Conditions in Diabetes
Infections
Fungal infections, especially those caused by Candida species, are the most common skin manifestation in many studies, followed by bacterial infections Vâță2023Sanad2013Alsunousi2024+1 MORE. These infections are more likely to occur in people with poorly controlled blood sugar and can affect various parts of the body, including the feet, nails, and skin folds Kutaj2025Vâță2023Sanad2013+2 MORE.
Xerosis and Pruritus
Dry skin (xerosis) and itching (pruritus) are also very common in diabetic patients, often leading to discomfort and an increased risk of skin breakdown and infection Kutaj2025Vâță2023Gisondi2020+3 MORE.
Diabetic Dermopathy and Necrobiosis Lipoidica
Diabetic dermopathy appears as small, round, brownish patches on the skin, usually on the shins, and is a marker of underlying diabetes Kutaj2025Vâță2023Duff2015+4 MORE. Necrobiosis lipoidica is a less common but distinctive condition, presenting as yellowish, waxy plaques, often on the lower legs Kutaj2025Vâță2023Duff2015+2 MORE.
Acanthosis Nigricans and Skin Tags
Acanthosis nigricans, characterized by dark, velvety patches in body folds, and skin tags (acrochordons) are frequently seen in diabetic patients and are associated with insulin resistance Kutaj2025Vâță2023Duff2015+4 MORE.
Other Manifestations
Other skin changes include granuloma annulare, scleredema, periungual telangiectasia, xanthelasma, and local reactions at insulin injection sites Duff2015Breznická2019Sanad2013+1 MORE. Some patients may also develop vitiligo or nail discoloration Sanad2013Gupta2021.
Pathophysiology: Why Diabetes Causes Skin Changes
High blood sugar (hyperglycemia) disrupts normal skin cell function, leading to impaired wound healing, increased oxidative stress, and inflammation Kutaj2025Gisondi2020. Diabetes also affects blood vessels (microangiopathy and macroangiopathy) and nerves (neuropathy), further contributing to skin problems Kutaj2025Gisondi2020Breznická2019. Insulin resistance and altered keratinocyte function can impair the skin’s barrier and hydration, making infections and other complications more likely .
Clinical Importance of Skin Manifestations in Diabetes
Skin changes can serve as early warning signs of undiagnosed or poorly controlled diabetes, providing a non-invasive way to monitor disease progression and glycemic control Kutaj2025Vâță2023Duff2015+3 MORE. Recognizing and treating these skin conditions early can help prevent complications, improve quality of life, and may even prompt earlier diagnosis of diabetes Kutaj2025Vâță2023Duff2015+2 MORE.
Patient Awareness and Education
Many patients are unaware of the link between diabetes and skin problems, highlighting the need for better education . Educational interventions, such as bilingual videos, have been shown to improve patient knowledge and may encourage earlier recognition and treatment of skin manifestations .
Conclusion
Skin manifestations are common and varied in diabetes, often serving as early indicators of the disease or its poor control. Recognizing these signs is important for timely diagnosis, effective management, and prevention of complications. Increased awareness among patients and healthcare providers can lead to better outcomes and improved quality of life for people living with diabetes Kutaj2025Vâță2023Duff2015+6 MORE.
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