While there are many causes of skin sores that do not heal, diabetes results in this type of sore on the feet and legs, notes WebMD. With diabetes, a small sore can turn into an ulcer that requires amputation to control ... More »

Diabetic sores have a variety of causes, the most common of which are dry skin and diabetic nerve damage, according to WebMD. Other causes of skin sores are external injuries, bacterial, yeast and fungal infections. More »

www.reference.com Health Pain & Symptoms

One of the most common causes of sores on a dog's skin is excessive licking, chewing or scratching. This can be due to itchiness or obsessive behavior stemming from psychological conditions. More »

www.reference.com Pets & Animals Pets Dogs

Leg sores that do not heal properly may indicate an underlying condition, such as diabetes or swelling in the legs, notes Cleveland Clinic. Sores that heal but keep returning can be a sign of skin cancer, according to th... More »

Scalp sores, bumps or blisters may be caused by folliculitis, impetigo, contact dermatitis, viral infections or skin conditions, such as acne, according to eMedicineHealth. Sebaceous or epidermal cysts and skin cancer ma... More »

www.reference.com Health Conditions & Diseases Skin Conditions

Treat raw or chafed skin by cleaning the area, applying a protective barrier and reducing the amount of friction against the skin, notes WebMD. If the chafed or raw area is painful, bleeding, crusted or swollen, an evalu... More »

Symptoms of an infection or skin sores caused by sand mites include small bumps or lumps on the skin, which can be covered by crust or a scab, according to the Centers for Disease Control and Prevention. Some individuals... More »