Most people have had a blister on their heel from new or uncomfortable shoes. The fluid forms under the damaged skin between the top layer (epidermis) and the bottom layer (dermis) of our skin and fills with plasma which leaks in from the surrounding tissues.
Common causes of blisters include:
A blister appears as a raised area of skin filled with clear fluid, or occasionally blood. Blisters can be quite tender and hurt if pressed or rubbed. Blisters are classified as 'vesicles' if they are 0.5 cm or less in diameter and as 'bullae' if they are larger.
In most cases, a small blister can be treated at home. Covered with a plaster, it will settle and heal over 3–7 days. Tips for caring for blisters:
To help prevent blisters:
Seek advice from your doctor, nurse or pharmacist if you have any of the following symptoms:
Blister Encyclopedia BritannicaFriction blisters DermNet, NZTreatment of burns St Johns First Aid Guide, NZ