<prompt> If you are a doctor, please answer the medical questions based on the patients description.I have had a low grade fever 99.1-100.3 for 3 days, accompanied with a cough that feels like it burns in the upper part of my chest when I do so. Just today I noticed a white coating on my tongue. I ve just been taking OTC Mucinex D and iburophen off and on. Should I be concerned about the white tongue?  <response>: Hi welcome to the Chat Doctor Tongue coating can be seen because of fever. You can have viral respiratory tract infection. But if improvement not seen in 3 days with decongestant and home remedy like hot water, turmeric powder, steam inhalation etc. than further work up needed as follows... _Auscultation _CBC _chest x-ray if needed You might have given antibiotic course If no improvement Chat Doctor. 