Some of the Skin disorders are not dangerous, they are called as benign skin neoplasms.
Callus is the increased growth of cells in the horny layer of the epidermis due to pressure or friction.
The feet and the hands are common sites. A corn is a type of callus that develops as a hard core.
Keloid is hypertrophied , thickened scar formed after trauma or surgical incision.
Keloids occur from excessive collagen formation in the coriumduring connective tissue repair.
Keratosis is the thickened area of the epidermis.
Some keratosis are red and are due to excessive exposure to light.
Seborrheic keratoses are yellow or brown and are also called senile warts. Both these types of keratoses occur in middle age and old age.
Leukoplakia are white, thickened patches on mucous membrane tissue of the tongue or cheek.
This is a precancerous lesion.
Leukoplakia is common in smokers and may be caused by chronic infalmmation.
Nevus are pigmented lesions of the skin.
Nevus include dilated blood vessels radiating out from a point of hemangiomas, and moles.
Many nevus are present at birthbut some are acquired.
Dysplastic nevi are moles that do not form properly and may progress to form a type of skin called melanoma.