Tzaraat, tradition says, is the mark of harmful speech. The mouth that wounds eventually shows itself on the skin.
The Sages read the laws of tzaraat as a spiritual diagnosis of lashon hara, speech that damages. The person is sent outside the camp, not as punishment alone, but so they can see what their words have done to community.
The isolation is temporary. The purpose is teshuvah, return, both to the camp and to a more careful mouth.
This week, notice one thing you almost said about someone. Notice the impulse. Do not say it. See how it feels.