Based on your history and the photo, this lump on the soft palate is most likely a reactive inflammatory swelling related to your recent tonsillitis and ongoing infection, not something serious. During throat infections, nearby tissues and minor salivary glands can become temporarily enlarged and firm, and these often appear suddenly. The reassuring signs are that it is painless, recent in onset, and appeared during an active infection. Such swellings usually reduce on their own as the infection settles with antibiotics. I would advise completing the prescribed course, maintaining good oral hygiene, and avoiding irritation (spicy or very hot foods). If the lump does not reduce after 2–3 weeks, increases in size, becomes painful, or develops ulceration, you should get it examined by an ENT specialist or dentist for confirmation. At this stage, there is no immediate cause for alarm.

To my view in the referred image, I feel that while you are undergoing the antibiotic treatment, it produces heat in the body which can cause pistule formation . Avoid smoking and having spicy food consume food, which is at room temperature This is not a serious problem. They should go on it own.

Doesn't seem to be serious looks like trauma from burn ...just apply honey on affected side

The picture you share is not so clear...but a/c to that I want to ask some questions... (1) Share your personal habits like smoking or tobacco....or any.. (2) Are you gone through any trauma in the past...

Hello The redness which is seen can be caused due to any trauma while eating/burn. But kindly get it checked physically once from your nearest dentist

Hello This looks like a normal burn or infection spreading from the tonsillitis There’s nothing to worry about it

Hello, Considering the recent acute tonsillitis and ongoing infection, a firm, painless lump on the soft palate is most commonly due to reactive inflammation, lymphoid tissue response, or minor local trauma. Such swellings are usually benign and temporary and can appear during or after throat infections. Continue the current antibiotic course and maintain good oral hygiene. Avoid very hot or spicy foods for a few days. If the lump does not reduce over the next 10–14 days, increases in size, becomes painful, or shows surface changes, a direct clinical examination is advised.