Hello and welcome to 'Ask a Doctor' service.
I have reviewed your query and here is my advice.
As per your complain recurring bumps in your mouth along with mucous congestion and huge tonsils are all indicating towards infection. As you have recurring
post nasal drip leading to inflammation in throat, tonsils, it is the cause for inflammation of the roof of mouth and formation of bumps.
In case if you have congestion also there is a possibility that you have
sinus infection or sinusitis also. I would suggest you to consult an otolaryngologist and get evaluated and a thorough clinical evaluation and investigations like PNS VIEW x ray or MRI of sinuses and
sputum culture can help in diagnosis.
You can be advised to take a course of antibiotics like augmentin, anti inflammatory painkiller like Ibuprofen anti allergics like Benadryl, do warm saline gargles, steam inhalation and use a humidifier in your room.
You can take decongestant nasal spray like
xylometazoline, do saline
nasal irrigation. You can also take mucolytics like ambroxol. Limit intake of cold and spicy food. Drink plenty of water.
Hope I have answered your query. Let me know if I can assist you further.
Regards,
Dr. Honey Nandwani Arora