Red spots on the scalp may be caused by folliculitis, tinea capitis, contact dermatitis, seborrheic dermatitis and so on. 1. Folliculitis: occurs in the head, face, neck and other parts of the body, mainly due to staphylococcus aureus infection, high temperature, sweating, poor hygiene habits can induce bacterial infection. 2. Tinea capitis: it may be associated with contact with patients or animals with ringworm, sharing contaminated hats, barber tools, etc., thus causing fungal infections, resulting in ringworm, which may manifest as erythema, papules, scales, itching, hair loss and other symptoms. 3. Contact dermatitis: such as contact shampoo supplies, cosmetics and other allergies, resulting in erythema, papules, itching and other symptoms. 4. Seborrheic dermatitis: Increased sebum on the head and face, impaired skin barrier function, etc. cause Malassezia colonization, resulting in erythema and greasy flaking. There are many causes of red spots on the scalp, so it is recommended that you go to the hospital to find out the cause of the problem and follow the doctor’s instructions for treatment as soon as possible.