Based on your description, these white spots are most likely Fordyce granules (sebaceous glands), which are a normal anatomical variation and commonly seen on the inner cheeks.
They can become more noticeable after trauma like cheek biting or during healing.
This is harmless, not an infection, and not related to cancer.
No specific treatment is required, and they usually become less prominent over time.
Avoid repeated cheek biting, maintain good oral hygiene, and stay well hydrated.
Next Steps
If there is pain, ulceration, or any change in size or color, a follow-up examination is advised.