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.
The real deal on breakouts and touching your face is... If you are acne-prone, absolutely face-touching can lead to breakouts. Rather than the word 'cause,' however, think 'trigger.' Acne is caused by the confluence three factors: excess oil, excess skin shedding and p. acnes bacteria, said Dr. Shamban.ouching your face isn't an easy thing to stop doing. If it's a serious habit that seems impossible to break, Dr. Shamban recommends a session or two with a licensed hypnotherapist. For a willpower boost, it's simple: Gross yourself out.