<s>[INST] I have noticed a white coat at towards the back of my tongue for about a year now it s kinda hard to reach with my toothbrush without gagging. a couple years ago I had a bad staph infection and took some antibiotics and every so often the boils will come back they only come on my thighs and about two months ago I was on like 3 different antibiotics [/INST] I have read your problem, Looking to your Oral health, you are not maintaining well. This is not your fault, because of less knowledge of oral hygiene care. So go to the dentist place, He or She will guide you about proper method of brushing (twice a day morning and night)and use antiseptic mouth wash once a day, in addition to this one should clean tongue with tongue cleaner twice a day while we are brushing. Take some good antibiotic, b -complex, antioxidants,riboflavin(For 1 month) and use antiseptic mouth wash. </s>