It is very common to experience skin issues when blood sugar levels are high, as diabetes can cause dry skin and make you more prone to infections. The most important step is working with your doctor to manage your blood sugar. For dry or itchy skin, apply a fragrance-free moisturising cream containing urea or ceramide daily. If you have a fungal infection (common in skin folds), an over-the-counter antifungal cream like clotrimazole or miconazole can help. For bacterial infections, a prescription antibiotic ointment like mupirocin might be needed. Please consult your doctor or a dermatologist for a proper diagnosis before starting these treatments.