How do you stop boyfriend from picking nose?

* Talk to him about it. Express your concerns to him in a respectful, non-judgmental way. Let him know that you're concerned about his health and appearance, and that you want him to stop picking his nose.

* Suggest alternative ways to deal with nasal discomfort. If he's picking his nose because he's congested or has allergies, suggest that he try using a saline nasal spray or allergy medication instead.

* Set boundaries. Let him know that you don't want him to pick his nose in public, and that you'd prefer if he didn't do it in front of you either.

* Be supportive. If he's struggling to stop picking his nose, be supportive and let him know that you're there for him. Offer to help him find a solution that works for him.