Never Get Black Henna

Three weeks after it, I still have a red thing where te tatoo was. Then yesterday, I was really itchy and i looked at a product and found it contained benzocaine. So I hopped online to the site that warns you of oher medications you can have a reaction to and guess what was on it! Benzocaine! So now I'm freaking out about what other kinda crap I have to watch out for because of this stupid black henna. I'm so pissed because my friend told me it was safe, and doesn't realize how bad the reaction is (I haven' seen her yet since then.) I'm also freaking ot because with a bad raction you can get random welts after time and I have to strange dots on my arm... I really hope they're just mosquitoes bites, isA.