It is congealing of the external layer of the skin. This external layer holds a hard, protective protein which is known as keratin. This skin congealing is frequently part of the skin’s normal defense against rubbing, pressure and other types of local nuisance. It brings calluses and corns on hands and feet. It can make whitish areas inside the mouth.
Some other types of hyperkeratosis can take place as part of the skin’s protection against:
- Continual (long-lasting) irritation
- Ultra Violet Rays
- Nauseating chemicals
Sometimes, hyperkeratosis grows on skin that has not been irritated. Such types of hyperkeratosis may be due to inherited condition. They may start rapidly after birth and can have an effect on large part of the body skin.
Hyperkeratosis has many examples. Some include:
- Corns and calluses: The areas which are exposed to repeated friction or pressure are affected by Corns and calluses. In the process, thick layers of dead skin cells pile up and become firm. Calluses develop on soles of the fee and palms of the hand, while corns are formed on the irritated toes. For many people corns and calluses are irritations due to use of cosmetics. But some people also suffer trouble and pain from them.
- Warts: These are small bumps on the skin that occurs due to infection of human Papilloma virus (HPV). Plantar warts develop on the soles of the feet. The HPV virus generally spread by direct contact. It is normally spread by touching or shaking hands with someone who is already infected or has a wart. It also spreads by coming in contact with an infected surface, such as by walking without shoes on floor of gym or a pool deck or by wearing shoes of any other person.
- Chronic Eczema: Eczema is a soreness of the skin. Its causes are allergies, irritating chemicals and other factors. It is also known as dermatitis.
- Lichen Planus. In this condition lacy white patch appear inside of the mouth. Or it may also be a scratchy, purple, flaking patch somewhere else on the skin.
- Actinic Keratoses: Flat, red, rough, sandpaper like spots or patches of skin are called Actinic Keratoses. They are very small in size. Their occurrence is due to excessive exposure to ultra violet rays of sunlight. They occur on those parts of body, which are normally more exposed to the sunlight.
- Seborrheic Keratoses: Small skin growths in brown, black or tan colour are known as Seborrheic Keratoses. Their causes are unknown.
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