It’s clearly visible on the thumb but not everyone’s lunula is visible. In some cases, the thick layer of skin surrounding fingernails and toenails, may partially or completely cover the lunula.
According to traditional medicine, the lunula can easily explain some very important information about a person’s overall health. The lunula usually tells the disease of a person in the form of disappearing crescent or color change. According to traditional Chinese medicine if your lunula has reddish smudges you may experience cardiovascular problems while a pale or bluish lunula indicates possible diabetes.
A really small lunula usually indicates indigestion as a result of a slow metabolism and toxin overload in the body. Whereas a lack of lunula is linked to anemia and malnutrition.