I had a hamstring injury. They hurt man! That's a big muscle and when I pulled it, youza. It took awhile to get better from that. The old RICE method of taking care of it helped me. R= rest, I = ice, C =compression (wrap with ace bandage), and E =elevation (when sitting, put legs up). I'm a big fan of Icy Hot rub, Salon Pass menthol sheets that you stick on (pick one of those two) and Arnica that you rub on. Ibuprofen helps me too if you are able to take that. Gentle stretching. I also ran into it getting painful again while it was healing from the least movement after. I'd be back to square one. But eventually it DID get better. https://www.webmd.com/fitness-exercise/hamstring-strain#1 You can always consult with a doctor and if it keeps up, a physical therapist is helpful.