<unk>  caused by a treadmill. Example of a third-degree<unk>  A<unk>  is a form of abrasion caused by the<unk>  of skin rubbing against a surface. A<unk>  may also be referred to as skinning, chafing, or a term named for the surface causing the burn such as rope burn, carpet burn or rug burn. Because<unk>  generates heat, extreme cases of chafing may result in genuine burning of the outer layers of skin. The dermal papillae may be exposed after top layers of the dermis (stratum corneum, stratum granulosum, stratum spinosum and stratum basale) have been removed. This is often uncomfortable and even painful, but rarely results in bleeding. A person's own skin (or the skin of another person) may be sufficient to act as an abrasive surface to cause<unk> . More commonly,<unk>  with abrasive surfaces, including clothing, carpet, or rope, can lead to a<unk> . Common places at which skin-to-skin chafing can occur are between the thighs and under the armpits.<unk> s are very common with clothing such as trousers on the knees caused by playing sport or sliding on wooden surfaces. Less dangerous<unk> s can occur frequently on sensitive skin surfaces such as the genitals, such as during sexual intercourse or masturbation. The risks of a<unk>  include infection and temporary or permanent scarring.
Friction burn
Millipede burn
Flash burn
Electrical burn
Chemical burn
Thermal burn
Powder burn
Hydrofluoric acid burn