What to do if neon spilled on my brother's arm?

It is not toxic or anything . One time I actually swallowed a tiny bit and I was worried but then i found out the only possible way it can maybe make you sick is if you drink the whole thing .I got some on me too and nothing happened so don't worry he will be fine . Don't panic because it wont harm him . After a few days it will go away. I hope I have helped .