I Had A Swelling On The Left Side Of My

I had a swelling on the left side of my neck two months back and there was pain.which subsided after taking Advil for two days but the swelling was there even though it went on reducing.i got all the bold tests done and sonography too .there were four masses which were like cysts .now the swelling is almost going but I am prescribed thyrowell tab,eats for sometime