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.
Brown spots are known as Melasma in medical terms. It appears as small patches on parts like nose, cheeks, face, forehead and upper lip. Women have more chance for getting brown spots during their menstrual cycle. Women who are in the reproductive cycle, belonging to age group of 20-50 years will have brown spots often.t may occur on the center of the face, on your cheeks and on the jawbone. Very often it is seen on the cheeks, upper lip, nose and forehead. It is very rare to see brown spots on other parts of your body.