treadmill

I sick last week my leg ached. I hurt my leg while running the treadmill so I went to the doctor.
what is the doctor told me the  problem
I said ; I 've hurt my  leg running
He asked how many days before?
I said two days ago
The doctor said do you have another problem?
I said no
The doctor give me muscle relaxant drug
now my leg is healed .I'm very happy now:):)