Redness, swelling and pain after the body has been exposed to the sun, usually also known as sunburn or solar dermatitis, can be relieved by paying attention to sun protection, topical treatments, and medication interventions. 1. Attention to sunscreen: Because this is mainly caused by sun exposure, sunburned areas should be avoided to prevent the phenomenon of infection or secondary damage. 2. Local treatment: for mild to moderate sunburn, patients can use moisturizing cream or aloe vera gel and other applications or wet compresses, can play a role in relieving pain and discomfort. If the local oozing is obvious, you can also choose 3% compound boric acid solution wet compress treatment. 3. Pharmacological intervention: patients can be applied externally with glycerite lotion, which can stop itching, and if necessary, glucocorticoid ointment such as hydrocortisone can be chosen according to medical advice, which can control the local inflammation and relieve the patient’s symptoms. If the body is exposed to the sun after the symptoms of redness, swelling and pain, should be timely supplementation of water, to prevent dehydration, and at the same time to follow the doctor’s instructions for the above treatment, do not self-medication.