I bit my lip about a week ago. it bled and then i ended up biting it again. now all blistered and ulcered. any pain relief, absolutely killing me?

Yes: If the part you're biting is the 'wet' part of your lip, try hloraseptic liquid. If on the 'dry' part, use benzocaine cream or ointment See your dentist for a night splint which will keep you from biting your lip in the first place.

Visit your GP: In most cases mouth injuries look worse than they are and NSAIDs or Tylenol (acetaminophen) is sufficient to manage the pain. However, if you have signs of infection, such as: severe pain, fever, swelling, warmth, or redness do not hesitate to visit your doctor.