The ONLY way to produce a tiger or lion with a white coat is through inbreeding brother to sister or father to daughter; generation after generation after generation. The kind of severe inbreeding that is required to produce the mutation of a white coat also causes a number of other defects in these big cats.
Causes of Bumps on Skin. 1  Acne (Pimples) Acne is a localized skin inflammation as a result of overactivity of oil glands at the base of hair follicles. 2  Actinic Keratosis Actinic keratoses are rough, scaly patches of skin that are considered precancerous and are due to sun exposure.
What is keratosis pilaris? Keratosis pilaris is a skin disorder that causes rough patches and small, acne-like bumps on the skin, according to Mayo Clinic. It affects the skin especially on the thighs, cheeks, arms and buttocks, but this condition rarely causes itching or pain. Although common in young children, it can also attack adults.