The whole body pain after sunbathing is normally a normal physiological phenomenon, but it does not exclude photosensitive dermatitis, heat stroke reaction and other causes. 1. Normal physiological phenomenon: If the patient lacks exercise, the body’s neural regulation ability is weak, long time sunbathing, the body’s thermoregulation ability is poor, it will cause the symptoms of generalized pain after sunbathing. 2. Photosensitive dermatitis: if you are allergic to the components of the sunlight, after sun exposure to allergic skin reactions, which will appear after sun exposure to the whole body pain, and accompanied by skin redness, swelling, rash, itching and other symptoms. 3. Heatstroke reaction: if the patient is a long time high heat or high temperature in the environment of work, study, life, resulting in a persistent increase in body temperature, may cause damage to muscle tissue, there will be a generalized pain after sun exposure symptoms. The specific situation should also go to the hospital in a timely manner to confirm the examination, after the cause is clear, under the guidance of a professional physician to carry out targeted treatment, to avoid the impact on the health of the body.