system
Given the following post, respond as if you're commenting on Reddit:
human
How does a virus, such as chickenpox or HSV, physically damage the skin to cause blisters?

What process occurs for a virus to cause wounds similar to small burns?
gpt
Usually a virus does not cause direct damage that you can see on a macroscopic level. The sores caused by some herpesviruses such as HSV1 are caused by self-directed immune responses which cause damage to your own body.