People with Trichotillomania are not limited in work, but rather by stigma that surrounds hair pulling and the associated bald spots it causes. One has to be careful because pulling constantly involves hand-to-skin contact, so jobs where the hands are covered in corrosive materials, or where health codes are in place (like handling food), are more tricky but not impossible. You just have to be more careful, ensuring your pulling doesn't break any codes or rules (wearing gloves, washing hands, etc.), nothing too complicated.