I woke in the night with severe groin pain, on my left side. It was difficult to walk, but eventually I could stand upright. It does not hurt when I bring my legs together, or if I raise my knee. It is not tender to touch. What could it be?

Tendon strain or ligament sprains are the most common cause of groin pain, especiallly after sport but a bone fracture, a pinched nerve, a urinary tract infection, hernia or 'referred' kidney stone pain can also be responsible.

As you didn't mention any sporting or exertion-related event, I'd ask you to visit the doctor in order that you can eliminate the possibility of kidney stones.

Please let us know what the results are and we'll very happily advise further.

Best wishes

Earle