What disease is the blister on the joint of finger and toe?

Hello. According to your description, you should have tinea of hands and feet.

Guiding opinions:

Tinea manus and pedis is a fungal infection, so it is suggested that you can penetrate air shoes at ordinary times. You can soak your hands and feet with warm water every night. Don't scratch with your hands, it's easy to get infected. You can buy coral ringworm nets to soak your hands. Soak your feet. Rub some dakening ointment.