Is It Safe To Take Advil To Relive Pain Of Buttocks And Leg On Injury?

I fell down twice this week. Once on my butt & legs backwards when I was shopping slipping on a slippery spot at Target. It hurt for a while . I also fell down like face first today on a slippery spot while I was volunteering & I noticed when I got up it was clean it was slippery. Can falling before make the pain worse? Also how long does it last? I took some advil when I got home. My