If you are playing with the following parts of your body, you may be at a health risk. Nail-biting can leave the skin surrounding the nails irritated and can cause stun nail growth. If you pick nail paint leaves, it will make them brittle and dry. Scratching your face at blackheads and acne leaves permanent blemishes. Playing with grey hair can lead to scarring and infection. Body mosquito bites can lead to inflammation and irritation if you keep scratching.
