Is the pain evil?

The pain is not evil.

The Pain is a message to you. (It sounds mysterious, though)

The pain is meaningful and sent to you.

Therefore, there must be a cause of pain.

For example, if you are suffering from pain due to how you use your body, you simply have to avoid using your body again as before.

The pain tells you, "The usage is wrong."

You can prevent or relieve pain by just being aware of your body, even if only a little.

By the way, even if it doesn't hurt, calluses, blisters, and abrasions that you can make on your feet are also messages to you.

They are trying to tell you that you have problems with your posture or movement.