How long does tendonitis last?

Tendonitis!!! please give me SOMETHING. any advice helps!?

• so i over trained last xc season(went from never running in my life to 12 miles a day, atleast 5 days a week)..and i never took time off to recover from my injuries, i just ran through them. same with track. i had xc practice in the morning, track after school, then i ran on my own. this summer i was forced to take off and heal. i did, and lost alot of muscle doing so(i also went on extreme dieting, which i now regret). so my times were really slow when i started running 2 weeks ago. i didnt over train though, about 2-3 miles a day, thats it.but then i got tendonitis in my knee!! i took a week off and thought it healed, but i had a really short run today and my knee is hurting again! before, my injuries were mainly in my ankles/calves, no real probs with my knee. how do i stop this? prevent it? what cures tendonitis? how do i run through it? the other kids on the team have been running all summer and already competing!! i havent run at all and am so out of shape!! how do i get in shape quicker so i dont look so slow at meets? thanks!

• Answer:

  Not smart to "run" through injuries and never give yourself a break. Is there a reason why you aren't under a doctor's care? There is nothing you personally can do yet until a doctor sees you. We can't suggest anything because we don't know your medical history. However, I can see that you are over-doing this. The extreme dieting is also a red flag. And being upset about others training and then thinking you're out of shape....definite red flags. You need to tell a doctor all of this. See a nutritionist as well to get you on an exercise/physical therapy routine and food plan that it tailored to your needs. Stop stressing yourself. You have an injury and it will only get worse if you don't see a doc.