If the skin itches significantly after sun exposure and long bumps appear, the patient is considered to have developed heliodermatitis, which is an allergy to sunlight. Patients are first treated orally with antihistamines, such as loratadine, cetirizine, paracetamol, ibastine tablets, and fexofenadine. Also available are glycopyrrolate lotion, and glucocorticoid ointment applied topically to sedate and soothe, and to counteract allergic reactions. However, patients should pay attention to the appearance of solar dermatitis, a certain period of time to protect their skin from sun exposure again, go out and apply sunscreen.