Whether it's from the sun itself or just a sunlamp, a sunburn can be painful and even debilitating.
Clouds offer little protection.
You can get a bad sunburn on a cloudy day. Even sunlight reflected from snow, water, sand, or bright clothing can give you a burn. Sunburns usually take from 3 days to 3 weeks to heal, depending on their severity. Repeated sunburn can eventually cause wrinkles, brown spots on the skin, and skin cancer. A typical sunburn includes redness, swelling, pain, blisters and peeling on the burned area.