Solution:

In reality, not a skin condition, but whatever.

We all get at some point, I wish I could remember the name of the product then i used when I was little but i cannot: (you have to brown around the cap.

Basically most lice shampoos kil them chemically, but only need one to survive and become immune to the shampoo caste to become ineffective, but i used a suffocating covering them instead of killing them chemically so that unless they become anaerobic at some point that will not be immune

You'll have to look for I fear

(Via Y!)