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.
Sebaceous hyperplasia is the technical name for a benign bump on the skin that forms over time as a result of damage, leading to an ongoing problem with over-productive oil glands.ebaceous hyperplasia forms deep within the skin right at the base of the oil gland itself, and scrubs simply can't reach the source of the problem. Warning: If you zealously try to scrub away these bumps, over-scrubbing the skin can lead to other skin issues, such as dryness and irritation.