Hi and welcome to HCM
Do not afraid, this is not renal cell carcinoma
. The fact that your pain is occurring with movements indicates a muscle strain
. Any strained muscle when stretched gives severe pain
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 lift weight or try to do exercise that involve painful muscles. Give proper time for the injury to heal.
Hope this will helps you. Take care.