Guide me on a oral issue. Inside mouth!

During my thoat infection episode in december 2021 i noticed redness in back of throat , soft palate and some areas of my left upper molar towards hard palate. I visited my ENT for follow Later on 4th feb i noticed redness medial to left upper molar towards soft palate . First i said myself let give it time or may be its just normal color change of area. Than on 30 april i noticed tye same area redness increased and looks puffy , so i visited nearby maxillofacial surgeon , he said dont take stress and prescribed me some vitamins , calcium tabs . Later again may last i visited the same OMS and the redness still remained same , on touch its soft puffy again he adviced to continue the same . Now for last 4 days the area kept piching and redness slighly increased . I asked doctor to evaluate through any test that eliminate any PMD or MD possibility but he seems just advice me to contd the same . FEB to JUNE redness increasing with time with puffy area inside mouth