There are many causes of large blisters on the feet, such as contact dermatitis, drug rash, friction, burns and other causes.
1. Contact dermatitis: skin contact with external sensitizers may cause contact dermatitis at the contact site, causing skin erythema, blisters, itching, which may lead to large blisters on the feet.
2. Drug rash: local medication, or systemic drug allergic reaction to drugs, may also lead to large blisters on the feet.
3. Friction: If you wear inappropriate shoes or due to long-term walking, local friction may cause large blisters on the friction area.
4. Scald: If the external high temperature stimulation caused by burns, may also lead to large blisters on the feet.
Large blisters on the feet, there may be other reasons, need to go to the hospital in time to check, clear cause.