My knee has been swollen and achy for months, it happened months ago after i ran a hill and went to bend down at work, it swelled and felt like vice?

Knee Swelling: There are a multitude of reasons for why you get swelling in the knee. The most important thing to do is see an orthopedist who can properly evaluate your knee.

Damage inside: the knee such as ligament or cartiladge tear is a real possibility . An Urgent care center visit and mri of the knee will be very useful to determine the extent of damage.