Physical education is a unique aspect of education in that it provides the only. instruction for students in the development and maintenance of positive attitudes, essential knowledge and physical skills. The contribution of physical education is to.
1 Kidney disease can cause a build-up of nitrogen waste products in the blood, which can damage nails. 2  Liver disease can damage nails.  Thyroid diseases such as hyperthyroidism or hypothyroidism may cause brittle nails or splitting of the nail bed from the nail plate (onycholysis).
Crushing the base of the nail or the nail bed may cause a permanent deformity. Chronic picking or rubbing of the skin behind the nail can cause a washboard nail. Long-term exposure to moisture or nail polish can cause nails to peel and become brittle.