The SQL NULL is the term used to represent a missing value. A NULL value in a table is a value in a field that appears to be blank. A field with a NULL value is a field with no value. It is very important to understand that a NULL value is different than a zero value or a field that contains spaces.
spot under tongue pierce. Secondly, tongue piercing is another cause of dark spots on tongue and lips. After the tongue piercing has healed, a dark spot is left on the tongue. The piercing also can lead to dark spot on tongue symptoms because the practice promotes fungal infections. More so, at pierce point, normal tongue pigmentation is lost.
Glossitis causes a swollen tongue due to a variety of infectious or inflammatory conditions. Infectious conditions include a tongue bacterial infection, yeast infection or viral infection, such as herpes simplex. Conditions that cause tongue inflammation or irritation include exposure to very hot foods or beverages, spicy foods, tobacco and alcohol.