Depends: Depends on where on the lips it is. May be trauma(biting/bumping), Herpes, salivary gland (inner lip), blocked pore (edge of lip), etc. Best to get your Dentist or Oral Surgeon to take a look and advise you . Good Luck.
Answered 4/28/2015
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A doctor has provided 1 answer
A doctor has provided 1 answer
A doctor has provided 1 answer
A doctor has provided 1 answer
2 doctors weighed in across 2 answers
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