Common skin diseases in diabetic patients are: 1, diabetic dermatosis is the most common skin lesion of diabetes, accounting for about 50% of diabetic patients, more men than women, usually without clinical symptoms. This disease is characterized by multiple hyperpigmentation of the skin on the distal extensor side of the lower limbs. At first, the lesions are round or ovoid dark red papules, which then become atrophic spots under the dark brown color. In the treatment is mainly active treatment of diabetes. 2, skin infections diabetic patients are prone to bacterial and fungal infectious skin diseases, the condition is more serious than the average patient and is not easy to treat, will also make the condition of diabetes aggravated and not easy to control. The common bacterial infection is Staphylococcus aureus infection, which is clinically manifested as skin boils and carbuncles, gangrene, cellulitis, folliculitis and so on. Fungal infections include all kinds of dermatophytosis and skin and mucous membrane candidiasis, such as vulvovaginitis, glans, glans eruption and inguinitis. 3, itchy skin about 5% of diabetic patients have itchy skin. It is divided into generalized itching and limited itching. The former is more common in elderly diabetic patients, may be related to diabetic neuropathy caused by dry skin; the latter is more common in female diabetic patients, often associated with local Candida infection. 4, diabetic sclerosing edema about 5% of diabetic patients with this disease, mostly in adults and obese patients; is in the dermis between the collagen fibers with acidic mucopolysaccharides, especially hyaluronidase deposition of a mucin deposition disease. Mainly occurs in the neck, upper back and shoulders, the skin is light red or pale, the surface is glossy non-invasive hard swelling, tissue thickening. 5, vascular disorders caused by skin disease diabetic gangrene, diabetic lipoatrophy, diabetic skin flushing, purpura, diabetic fat-like progressive necrosis, diabetic maculopapular and so on. 6.Disorders of fat metabolism caused by skin disease diabetic xanthoma, lid xanthoma, carotenoidosis. 7, neuropathy caused by diabetic anhidrosis, diabetic neuropathic ulcer.