Also, nail biting and repeated picking at the cuticle can lead to an abnormal appearing nail. The nails can reveal much about a person's overall health. Many diseases and serious conditions can be detected by changes in the nails. In general, nail disorders respond very slowly to therapy due to the slow growth rate of the nail and it's inability to absorb medications very well. Treatments can be either surgical or non-surgical.
Surgical treatment is common to remove tumors or correct structural abnormalities.
Dr. Baral is the best person to determine the cause of any changes in your nails. He has done significant research in the treatment of nail disorders. The oil these glands make is called sebum. Sebaceous glands produce very little sebum before puberty, but during puberty they start to make larger quantities due to increase of hormones that follows puberty. Sebum normally flows up to the skin surface through hair follicles.