Ok so question. I dont know if this should be concerning or not. but I'm almost 4 weeks pp. and on…

Ok so question. I dont know if this should be concerning or not. but I'm almost 4 weeks pp. and on the same arm that I got my I.v I have a bump on my bone maybe three inches above where the iv was. it hurts when I touch it and I thought it would just go away but its just getting bigger.. and its bugging me.