differences between left and right hemispheres. 1  for many functions, there are no substantial differences between the left and right hemispheres. 2  lateralization of function is statistical rather than absolute. 3  tendencies:
When the nail plate separates from the nail bed, it causes a white discoloration. This is called onycholysis. This can be due to infection, trauma, or products used on the nails. Other causes for onycholysis include psoriasis and thyroid disease. Pitting. Pitting refers to small depressions, or little pits in the nail.
Fungus growing around the nail can cause the nail to separate from the nail bed as the fungus fills in the area. In this case, the nail will often become yellow or brown in addition to becoming thicker. Some skin conditionscan also affect the toenails and cause them to become thicker.