Thanks for writing to us.
It seems to be soft tissue injury
or muscles strain.
To get relief from the pain and for quick healing:
1. Do hot fomatation at the site.
2. Apply local anti-inflammatory gel 2-3 times a day.
3. Take anti-inflammatory drugs like Ibuprofen
to reduce pain and local swelling or inflammation.
4. Do not try to do exercise that involve painful muscles.
I do hope that you have found something helpful and I will be glad to answer any further query.