Hello,

Thanks for consulting HCM

Read your query ,as you have painful wisdom tooth this pain can be due to carious tooth , or impacted causing infection pericoronitis or pericoronal abscess.
For this I will suggest you to consult oral surgeon for oral examination and investigations iopa xray of region of wisdom tooth to rule out the cause of pain.
Inmeantime do warm saline gargle two - three times a day, you can also apply stolin gum pain on region of wisdom tooth .

Hope this will help you.

Thanks for your query, I have gone through your query.
The pain can be because of the gum infection over the wisdom tooth (pericoronal infection leading to space infection).
Consult a oral physician and get a radiograph done to rule the amount of space present for the tooth to erupt if space is there for the tooth to erupt then the gum covering over the wisdom tooth can be removed.
If the space is not available then you have to get the wisdom tooth removed.
The cephalexin works but If i am your treating doctor i would advise to take a course of antibiotics like amoxicillin 500mg and metronidazole 400mg tid for 5 days (if you are not allergic).
Do saline gargling. i hope my answer will help you, take care.