Pain in lower abdomen after mumps??

Well i had mumps about 4 months back..i was on a trip . i took heavy pain killers first my left side of throat swolled and later right..

as it subsided i started having mild pain in groin.. Doctor was worried so he got my done a scan for abdomin. saw very little signs of swelling and said it happenes sometime with mumps . the pain only subsisded as i took pain killers but i was fine from last 1 week didn't have much pain but suddenly yesterday i started having pain again..

what else can do? doctors dont have any other medication.. just said put a hotwater bottle and take pain killers.. i will go on its own.. but its almost 4-5 months now!!
and i need to get it cured..it scares me!!