My brothers tongue and palate are red and painful he had a cough and sinus drainage so a doctor gave him antibiotics and then he got sores on his lips which got worse because he used tooth numbing medication for tooth pain. now he is using neosporen on h

Sounds : Sounds like your brother needs to be seen by an oral specialist (oral and maxilofacial surgeon or ent) as the symptoms can be due to a multitude of things such a fungal or viral infection. Antibiotics are not the answer to these problems.

See dentist: Your brother needs to see a dentist to see what is causing the redness and painful areas, sometimes antibiotics cause the normal bacteria of the mouth to die and allows fungal infections to develop, he may need a antifungal to help with the sores and the numbing meds like oragel can increase the soreness and sore spots.

Needs a dentist: Your brother needs to see a dentist. He has been trying everything that he can think of and this can just be complicating things and causing him more problems and discomfort. Get him to a dentist who can determine just what the problem is and the best treatment.