There is a cocoon on my index finger. There is no usual friction in the long place, and the scope of the cocoon is slowly expanding. The cocoon is thick, and the index finger looks bigger than the other hand. Disease analysis:

In the absence of friction, this situation is generally not necessarily cocoon formation. In this case, it is the proliferation of keratinocytes, which grow under non-friction conditions and have a gradual increase trend. This is generally based on the performance of virus infection with verruca plana.

Guiding opinions:

In this case, finger infection with verrucous virus is generally considered. This is the expression of verruca plana, which can be removed by surgery such as laser. Antiviral treatment was given after resection.