The difference between first-degree burns and second-degree burns is mainly in the level of the damaged tissue, the performance of the burns, the healing time, and whether or not it leaves a scar. 1. Damage to the tissue level: first-degree burns only damage the superficial layer of the epidermis; superficial second-degree burns injure the epidermis of the hair layer and the papillary layer of the dermis, deep second-degree burns injure the dermis layer below, but still left part of the reticular layer. 2. Performance: first-degree burns can appear skin erythema, dry, accompanied by burning sensation. Superficial second-degree burns local erythema is obvious, accompanied by blisters of different sizes, pain is obvious; deep second-degree burns can also have blisters, but after removing the blister skin, the trauma is red and white, and there is a dulling of pain sensation. 3. The time needed for healing: one degree burns are often healed in about 3-7 days of flaking. Superficial second-degree burns often take 1 to 2 weeks, deep second-degree burns take 3 to 4 weeks. 4. Whether scarring remains: first-degree burns can have hyperpigmentation in a short period of time; superficial second-degree burns can leave hyperpigmentation, but no scarring, and deep second-degree burns often have keloid hyperplasia. If there is any discomfort, it is recommended to consult a doctor in time for diagnosis and treatment.