Talk to Ent Surgeon on Constant Sore Throat

my father is patient of hcc on background of hepatitis C. One month back after returning from umrah unki awaz bethi hui ha constant.fever nai ha but gala kharab ha. Dr se consult kia.his own gastroenterologist didnt prescribe nything regarding ths.cz fever ni ha. What should we do? Plz suggest. Took antibiotic for three days