Small bumps after sun exposure are generally referred to as solar dermatitis. General treatment, medication, and other treatments are needed to relieve the symptoms. Solar dermatitis is an inflammatory reaction to excessive exposure of the skin to ultraviolet light. 1. General treatment: remove the cause of the disease, avoid sun exposure, such as the use of sunscreen clothing, sunscreen umbrella, sunscreen and other sun protection measures to avoid skin contact with sunlight. 2. Drug therapy: generally can be used externally with glycerite lotion and or glucocorticoid such as hydrocortisone ointment, severe cases can be used 3% boric acid solution wet compress. Systemic symptoms can be oral antihistamines such as loratadine tablets, vitamin C, serious cases can be systematic application of glucocorticoids. All of the above drugs should be used in accordance with medical advice. After the sun after the small bumps, you need to consult a doctor in a timely manner, under the guidance of the doctor for treatment, so as not to delay the condition.