In general, the specific recovery time after sunburn can not be generalized, it needs to be different according to the degree of sunburn, the skin barrier function, whether sunscreen. 1. The degree of sunburn: If it is a mild sunburn, the exposure area appears red spots, itching, burning sensation, etc., this time the recovery time is shorter. If the skin is edematous and painful after sunburn, but without blisters or flaking, the recovery time will be prolonged. If the skin blisters after sunburn, and accompanied by hyperpigmentation, large areas of flaking, etc., it will take longer to recover. 2. Skin barrier function: when sunburned, if the skin barrier function is perfect, its recovery ability is stronger, the recovery time is shorter. If the skin barrier function is already damaged and the skin’s ability to recover after sun exposure is poor, the recovery time will be relatively long. 3. Whether sunscreen: If the sun before the sun, has done a good job of sunscreen, such as wearing sun hats, sun shirts or applying sunscreen, etc., the ultraviolet radiation caused by the skin damage is smaller, the shorter the recovery time will be. Also after sunburn, localized use of a clean towel cold compresses, etc., can relieve the symptoms to a certain extent and may shorten the skin recovery time. In weather with strong ultraviolet rays, you need to take sun protection measures when going out. When the sunburn is more serious, you should go to the regular hospital in time to seek medical treatment.