Flush, niacin and side effects.

[Candide]

Hi bro, i take 100 mg of Niacin one month ago, i had an O during the flush,and i have always side effects :
burning and stinging sensations. I don't understand. My hypothesis : having an O during the flush is dangerous, because my body is very low during the POIS and the niacin can destroy me, the side effects can stay forever... i don't know if is psychology... someone can help me please ?