A value of NULL indicates that the value is unknown. A value of NULL is different from an empty or zero value. No two null values are equal. Comparisons between two null values, or between a NULL and any other value, return unknown because the value of each NULL is unknown.
Skin Spots on the Face. Most causes of spots on face are harmless. They can be a variety of colors including white, red, black or brown. Common causes include cumulative sun exposure, acne, and skin tags. Keratoacanthoma (hyperkeratosis) is a lesion that grows rapidly, usually on areas exposed to the sun.
Melanoma is the most serious type of skin cancer, but if you detect it early, treatment can be successful. The areas most likely to have spots are the scalp, lips, ears, neck, chest, arms, hands, legs and the face. Spots can appear suddenly or slowly over time. See derm. ...Read more.