Vesicles
Alternative Names
Blisters
Considerations
A vesicle is small -- it may be as tiny as the top of a pin or up to 5 or 10 millimeters wide.
In many cases, vesicles break easily and release their fluid onto the skin. When this fluid dries, yellow crusts may remain on the skin surface.
Common Causes
Many diseases and conditions can cause vesicles. Some common examples include:
- Allergic reactions to drugs
- Atopic dermatitis (eczema)
- Blistering skin diseases including porphyria cutanea tarda and dermatitis herpetiformis
- Chicken pox
- Contact dermatitis (may be caused by poison ivy)
- Herpes simplex (cold sores, genital herpes)
- Herpes zoster (shingles)
- Impetigo
Home Care
As a general rule, your doctor should examine any skin rashes, including vesicles.
Over-the-counter treatments are available for certain conditions that cause vesicles, including poison ivy and cold sores.
Call Your Health Care Provider if
Call your doctor if you have any unexplained blisters on your skin.
What to Expect at Your Health Care Provider's Office
Your doctor will look at your skin. Some vesicules can be diagnosed simply by how they look.
In many cases, however, additional tests are needed. The fluid inside a blister may be sent to a lab for closer examination. In particularly difficult cases, a skin biopsy may be needed to make or confirm a diagnosis.
