I fell and injured my forearm near the elbow. the x-ray taken at urgent care came negative for fracture. three weeks later, i can still not fully extend my arm and it pops also. what should i do?

Need follow up: You can still have a fracture. Radial head fractures can be difficult to see at first. Because you are still having symptoms, follow up with your physician. He/she will like order a follow up x-ray. If that is negative, an MRI may be warranted. Hope you feel better soon.

Find a doctor!: If you continue to have symptoms despite a reported -ve xray then please go see a doctor; you may need a repeat film and/or an orthopedist/further work-up!

Fracture radial head: Prb radial head fx need repeat films.

Need new X-ray: Non-displaced fractures may be difficult to see on initial x-rays. I typically will repeat them in 1-2wks. In this case, radial head and/or neck fractures are common. Find a board certified orthopaedic specialist, for further evaluation and treatment.