Thanks for writing to us.
The pain and tenderness on the left side is likely to be due to a soft tissue injury
in the area. Since there are no skin color changes, a superficial hematoma
is not likely. You need to rest for a few days, take a mild pain killer and do a hot fomentation in the area for relief.
I hope this information has been both informative and helpful for you.
Dr. Praveen Tayal