My 10 yr old sprained ankle 2 months ago, had x-rays at er. she still has pain off and on. throbbing pain with slight swelling. ?

See doc: Subtle injuries like salter harris 1 injuries are commonly missed by the er. See a specialist.

Takes a while: An ankle is a weight bearing area, and as such will exhibit swelling depending upon use. I would gather it was a "sprain" and not a fracture, as with the latter it would take at least 6 weeks to mend in a cast of some sort. The throbbing and pain are related, as inflammatory fluids accumulate due to injury and gravity. Have her keep it elevated when possible, and reduce time on her feet.

Have it evaluated.: Swelling may last a long time following a foot or ankle injury. An x-ray can show if there is an underlying fracture. The x-rays may be falsely negative initially in cases of small stress fractures. You may have a soft tissue injury if it is just a sprain and may have damaged the muscle, tendon, or ligaments in the area. Have it evaluated by a professional and get the appropriate treatment.