Sir, I got many boils inside my mouth from yesterday. It is paining & lot of burning sensation. I'm drinking a lot of water & coconut water too. Pls help?

Canker sores. are the most common oral lesions. Individual ulcers typically last 1-2 weeks. Complications of canker sores can include fever, swollen glands, and feeling run-down. If concerned, see your doctor for evaluation.