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Many different conditions, for instance, can also cause sores on the scalp. Scalp sores can be unsightly, and depending on the cause of the sore, they can also lead to temporary hair loss. These disorders can be contained with the right treatment, but they often need to be diagnosed by a doctor. Scalp sores can be caused by viral, bacterial or fungal infections.
Symptoms depend on the affected area of the body: 1  Ringworm is a red skin rash that forms a ring around normal-looking skin. A worm doesn't cause it. 2  Scalp ringworm causes itchy, red patches on your head. It can leave bald spots. 3  Athlete's foot causes itching, burning and cracked skin between your toes. Jock itch causes an itchy, burning rash in your groin area. Over-the-counter creams and powders will get rid of many tinea infections, particularly athlete's foot and jock itch. Other cases require prescription medicine.