Hi,Dear Thanks for the query to HCM virtual Clinic. I studied your query with available details given in your query. I understood your health concerns. Cause of the red painful lumps on mouth roof and under tongue- My clinical opinion on your query is- -Cancre Ulcers/Apthous Ulcers as there is viral cold. -The chronicity of this cold with cough with thick expectoration,is mostly due to underlying chronic debility and concurrent secondary infection. -Possibility of other Viral(HIV)/protozoal infections needs to be done as the -chronic amoebiasis (could be without any vivid clinical abdominal problems)with eosinophilia could cause such Apthous ulcers with chronic cough. -Possibility of hidden TB in the body could also cause such painful bumps. Remedy- Consult ER Physician, Do Complete blood tests with ESR / ELISA TESTS/STOOL TESTs /IGRA -TB Blood Tests/X-ray Chest/AFB sputum test would fix the cause and treatment of such a case. Take treatment with guidance from ER Physician. Hope this reply would resolve your query and would help you to plan treatment with your doctor. Hope this would relieve of your health concerns. Welcome for any further query in this regard before final suggestions are given in your query. Wishing you fast recovery.. Have a good day. Dr.Savaskar M.N. Senior Surgical Specialist.