Sinus Medication Solution

I’ve been tapering my prednisone dosage for about a month now. Every time I get down to 5 mg., I get a HUGE sinus infection with unbearable head pain. Do you think the prednisone reduces swelling and when I cut back, my sinuses react by swelling?

I am 22 yr old.I had severe sinus probs whn i was studying my 10th..Later hav used kerela ayur n it has been reduced.After a long period,iam getting sinus probs again..please help to prevent reoccurence..Also provide me solutions to reduce my tommy as iam not fat but have to reduce my tommy..