Hi welcome to HCMForum. as you are describing it appears to be filarial infection. mther causes are muscle sprain
inguinal gland or crack in femoral head.
I advise you to consult an orthopedic surgeon. you may have to undergo tests c.t.scan and other routine tests. for confermation. before diagnosis you
can use anti inflamatory analgesics neurotropics for temporary relief under the supervision of a doctor.
Besides i advise you some diet restrictions as dont use pulses potato tamato cauliflower coconut egg chicken