Hello Welcome in H.C.M. I have gone through your query regarding yellowish coating over tongue, as you saidthat you are prone for strep throat infection. You are nterested to know about facts for recurrent throat infections. Firstly I would like to say that yellowish or whitish coating of tongue is basically due to- 1- Dyspepsia (gastric disturbances). 2- Upper respiratory tract infection. 3- Glossitis. Your second question is for recurrent strep infection in throat, for this I would like to say, there is possibility of pockets of infection in upper respiratory tract which gives rise to frequent strep infection in throat . This shows that you may be having- 1- Chronic maxillary sinusitis. 2- Chronic tonsillitis. 3- Nasalpolyps. All above harbours strep infection and discharges them from time totime. So please get yourself examined by ENT doctor to rule out above and manage accordingly. Regards.