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.
5. 1  Fades Skin Spots. 2  Mix Â¼ cup of raw papaya paste, 1 tablespoon of lemon juice and Â½ tablespoon of raw honey. 3  Apply it on the affected skin. 4  Allow it to dry, then wash it off with cool water. 5  Use this face mask 3 or 4 times a week to reduce spots of any kind.