I use arnica gel on all major bruises. Smacked my shin on my dishwasher door & had a huge lump on it. Put the arnica gel on it & I could actually watch the swelling of the lump come down. That was so strange to see. I don't take any meds so no interactions but I have such bad reactions to so many things & stay away from many natural things too.
Used Mullein tea for congestion & xylitol for a sore throat. I would never use stinging nettle because I got into it in a field behind my farm a few years ago on the back of my hand & by the end of the day my whole hand & arm were swollen like a balloon. I have so many bad reactions to things I am the kind of person who stays away from everything & just tries to let my own body do its thing & just try to eat good