That may be due to gum infection. Physical examination is necessary.

Advised to visit Dentist for clinical and radio graphic examination. If due to pericoronitis around wisdom tooth,wisdom tooth will be advised to be removed. But if it’s a recurring issue with enlargement of lymph nodes better to be examined clinically rather than guessing from pics !

Hello, Based on your description and the image, the white/yellowish patch behind the lower wisdom tooth along with a recurrent blister after eating is most commonly seen due to local irritation or trauma in that area. Possible causes include: • Food impaction and repeated friction from the wisdom tooth or opposing tooth • Inflamed operculum / pericoronitis around a partially erupted wisdom tooth • Mucous retention phenomenon or minor salivary gland blockage • Recurrent irritation can also cause reactive lymph node enlargement below the ear, which usually indicates a chronic local infection or inflammation Since the lesion is recurrent, painless, and associated with long-standing lymph nodes, it is important not to ignore it. What I recommend: ✔ A clinical oral examination ✔ OPG (panoramic X-ray) to evaluate the wisdom tooth position ✔ Assessment of the soft tissue lesion (to rule out leukoplakia or other mucosal conditions if it does not heal completely) Meanwhile: • Maintain good oral hygiene • Rinse with warm saline water • Avoid spicy, very hot, or sharp foods • Do not try to pop the blister intentionally If the white patch does not scrape off, increases in size, or persists beyond 2 weeks, a direct dental/OMFS consultation is mandatory. Please visit a dentist or oral surgeon in person for proper diagnosis and treatment planning.

Hello Kindly visit physically once

A painless white/yellowish patch near a wisdom tooth with recurrent blistering after meals is most commonly due to chronic local irritation or a blocked minor salivary gland (mucocele), often aggravated by the wisdom tooth area. The fact that the blister forms, bursts, and heals within a few days is not suggestive of cancer. Mildly enlarged lymph nodes can persist for long periods due to chronic oral or ENT irritation. Maintain good oral hygiene, avoid trauma/spicy foods, and get the wisdom tooth area clinically evaluated. If the patch persists beyond 2 weeks, increases in size, or becomes painful, consult an oral medicine specialist for examination.

Hello Please visit the dentist for the physical examination for proper diagnosis

Hello, From the picture and history, this looks like recurrent irritation around the lower wisdom tooth (pericoronitis). Food trapping behind the wisdom tooth can cause a white/yellow patch or small blister, which bursts and heals in a couple of days. This repeated inflammation can also explain the nearby lymph node swelling. Keep the area clean, rinse after meals, and avoid very spicy or hard food for a few days. If this problem keeps coming back, a clinical exam and X-ray are needed. In such cases, wisdom tooth removal is often the permanent solution.