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.
The most common Side Effects of Niacin are. Niacin Flush: This is the most common side effect of Niacin. However, this is not an alarming cause, but it can be very uncomfortable and unpleasant. In Niacin Flush, the blood vessels get dilated which generates a large amount of heat. The heat flush remains throughout the body for about fifteen to thirty minutes.