Gout

I used to get it in my foot roughly every three months and then got it in my knee (which swelled to three times its normal size and I had to go to the minor injury clinic).

They prescribed Allopurinol that I take every day and have never had another problem.

When I had an attack in my foot I used to find Naproxen worked really effectively as a pain killer and to take the swelling down. It's extremely bad for your stomach lining though and can cause ulcers.

I have gout. It feels like having been trodden on by an elephant!
Colchicine is for “emergencies”, to stop the pain asap. You should then be given allopurinol as prophylactic.
Among foods to avoid are mushrooms, asparagus and too much parsley. Red wines too.