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.
Keratosis pilaris is a common, harmless skin condition. It causes small, hard bumps that may make your skin feel like sandpaper. The bumps are often light-colored. They usually appear on your upper arms, thighs, and buttocks, sometimes with redness or swelling. They can also show up on your face, but that's less common. Except for some itching, keratosis pilaris doesn't hurt and doesn't get worse.