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.
Could be petechiae. Petechiae is blood leaking into your skin from little capillaries just under your skin. This blood leakage causes tiny red skin dots, little red skin spots or a pinpoint red rash symptoms to appear. Petechia dots routinely emerge in the lower leg region, but you can experience red spot distribution all over. Its red pinpoint rash can materialize very quickly or slowly over time.