I get pains in my knees that hurt really bad, they are very similar to growing pains. how can i fix this?

See MD: You need to be evaluated by a physician. There are many disorders that cause knee pain.

Time for consultatn: I would check with your doc for basic testing and if appropriate, see a sports medicine specialist. Confirming or excluding some of the inflammatory disorders or structural issues with the knee may take a few weeks or months but is worth the effort. Outcome could lead to medication or a surgical procedure.