1 doctor weighed in:
What are the causes of lip blisters ?
1 doctor weighed in

Dr. Stephen Friedman
Dermatology
In brief: Allergy or Infection
There are many etiologies for lip blisters.
Herpes simplex labialis affects many individuals and is due to a recurrent virus infection. It may be induced by stress, sunlight, and an underlying illness. Other causes include an allergy to a cosmetic ingredient. Systemic medications can also be associated with lip blisters.

In brief: Allergy or Infection
There are many etiologies for lip blisters.
Herpes simplex labialis affects many individuals and is due to a recurrent virus infection. It may be induced by stress, sunlight, and an underlying illness. Other causes include an allergy to a cosmetic ingredient. Systemic medications can also be associated with lip blisters.
Dr. Stephen Friedman
Dr. Stephen Friedman
Thank
Get help from a real doctor now
Dr. Christopher Crosby
Board Certified, Dermatology
12 years in practice
93K people helped
Continue
107,000 doctors available
Read more answers from doctors