Will my erythema multiforme flare up if i get a tattoo?

Probably not: The reports are flares or local EM-like reactions to henna and to some of the bright colors. Ordinary black tattoo ink is less likely to be a problem. Wait on getting inked, though, especially at your age. I'm a buff and have two, but you need to wait several years and if after that time it is STILL exactly what you want, go for it. Erythema mul