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You must vizit immediatly a dental office , can you send me a photo of your face , please ?
Hope this helps.
It's not possible to accurately diagnose your condition based on your description alone, Xrays and clinical evaluation in an office is essential. Please do not wait. The swelling is probably due to one or more abscessed teeth. If so, your dentist will prescribe antibiotics and treat the teeth accordingly. An abscessed tooth can progress into a dangerous situation. It is unlikely that you have a brain infection. But do not delay