Blisters from<unk> Typically, there is initial redness, followed by varying degrees of pain, proportional in severity to both the duration and intensity of exposure. Other symptoms can include blistering, swelling (edema), itching (pruritus), peeling skin, rash, nausea, fever, chills, and fainting (syncope). Also, a small amount of heat is given off from the burn, caused by the concentration of blood in the healing process, giving a warm feeling to the affected area.<unk> s may be classified as superficial, or partial thickness burns. Blistering is a sign of second degree<unk> . Variations Minor<unk> s typically cause nothing more than slight redness and tenderness to the affected areas. In more serious cases, blistering can occur. Extreme<unk> s can be painful to the point of debilitation and may require hospital care. Duration<unk>  can occur in less than 15 minutes, and in seconds when exposed to non-shielded welding arcs or other sources of intense ultraviolet light. Nevertheless, the inflicted harm is often not immediately obvious. After the exposure, skin may turn red in as little as 30 minutes but most often takes 2 to 6 hours. Pain is usually strongest 6 to 48 hours after exposure. The burn continues to develop for 1 to 3 days, occasionally followed by peeling skin in 3 to 8 days. Some peeling and itching may continue for several weeks. Skin cancer Ultraviolet radiation causes<unk> s and increases the risk of three types of skin cancer: melanoma, basal-cell carcinoma and squamous-cell carcinoma. Of greatest concern is that the melanoma risk increases in a dose-dependent manner with the number of a person's lifetime cumulative episodes of<unk> . It has been estimated that over 1/3 of melanomas in the United States and Australia could be prevented with regular sunscreen use.
Sunburn
Windburn
Grocer's itch
Gangrene
Swimmer's itch
Photokeratitis
Pachyderma
Melasma