The red and painful tip of the tongue may be due to temporary swelling and pain from biting the tongue, or it may be caused by eating overly stimulating food. The normal tip of the tongue is covered by a light white substance on the surface because of the presence of tongue coating and tongue papillae. When the white substance disappears and manifests itself as red and painful tongue tip, it may also suggest that there are pathological changes such as inflammation and ulcers in the tip of the tongue: 1. Inflammation: Inflammation of the tongue papillae in the tip of the tongue may be caused by poor oral hygiene due to poor tooth brushing, or consumption of spicy and stimulating food, or because of vitamin or trace element deficiency. For example, vitamin B or folic acid deficiency causes inflammation of the tip of the tongue, which can lead to redness, swelling and pain. In case of Candida albicans infection to the tip of the tongue, the symptoms are mainly redness of the local mucous membrane of the tip of the tongue and white scattered spots in the red area, which are initially limited but can gradually spread and increase in scope. If it occurs in the tip of the tongue, it can cause the tip of the tongue red, painful; 2, ulcers: the tip of the tongue mucous membrane by physical damage, or because of immune deficiency, mental stress and other factors leading to ulcers, ulcer surface slightly depressed, surrounded by congestion, redness and swelling, and accompanied by pain, so the appearance of the tip of the tongue ulcer will cause the symptoms of red and painful performance; 3, dry: such as oral dehydration or due to the disease dry syndrome, appear A large amount of saliva deficiency, the tip of the tongue can be due to dryness manifested as pain, bumpy feeling disappeared, redness, surface dryness and cracking.