Does this red blister grow on the knuckles itch?

Blisters appear on finger joints. First of all, this situation is considered to be a typical manifestation caused by eczema or sweating. This situation requires active and careful examination and diagnosis.

Guiding opinions:

It is recommended to go to the dermatology department for diagnosis before systematic treatment. It is usually caused by viral herpes, which is related to viral infection and easy to repeat. Attention should be paid to keep the local area clean and hygienic to avoid scratches, and acyclovir cream can be used for external use.

The above is a suggestion about the problem of "redness and itching around the blisters on the finger joints". I hope it helps you, and I wish you health!