Picture 1 â Sun Poisoning Rash. Source â prime health channel. When excessive exposure of the skin to the harmful UV rays of the sun causes an allergic reaction in the form of development of itchy skin rash and the reddening of the skin, one may be said to suffer from Sun Poisoning Rash.
Note that excess niacin intake can cause symptoms similar to an allergic reaction, including skin flushing, stomach redness and warmth, particularly of the face. Your physician may recommend allergy testing to determine if you have an allergy or symptoms of excess intake.
Below are detailed some of the signs that can occur when niacin, also known as vitamin B3, is depleted from the body. 1. Skin Signs. If you have vitamin B3 deficiency, lesions will start appearing on both sides of your body, symmetrically.. Gastrointestinal Symptoms. If you are vitamin B3 deficient, you may also experience a burning sensation in the pharynx and esophagus. In addition, the following signs may be noticed: 1  Abdominal discomfort. 2  Constipation. 3  Diarrhea. 4  Distention. 5  Nausea. 6  Vomiting.