 [ Symptoms ] for the last year i have been facing the problem with a black line on the left side of the nose how can i remove this [ Disease ] when there is a dark line along the bridge top of the nose it is often due to allergies and rubbing the nose the gold standard skin brightener is hydroquinone the typical prescription strength products contain 4 hydroquinone it can be irritating to your skin though so your dermatologist will review if this is the right treatment for you and how it should be used for your condition over the counter products can contain up to 2 hydroquinone but i believe this ingredient should only be used under the supervision of your dermatologist