Go see your GP about sharp knee pain. Really super sharp internal knee pain could be caused by meniscus tears or by loose cartiledge. Neither of those will sort themselves out by rest or by HTFU. I've had both knees go under the knife due to general wear and tear.
Not trying to scare the crap out of you, but your instict to see a GP is probably the right one.
Go see your GP about sharp knee pain. Really super sharp internal knee pain could be caused by meniscus tears or by loose cartiledge. Neither of those will sort themselves out by rest or by HTFU. I've had both knees go under the knife due to general wear and tear.
Not trying to scare the crap out of you, but your instict to see a GP is probably the right one.