I have a male client who has fine, white lines down the middle of his nails. His nails are also arched in the middle. Could dehydration be the cause?
Fine, white lines down the middle of the nail can be caused by many different things. It is possible that dehydration may be partly responsible; however, a fungal infection or injury to the nail matrix may also cause fine, white lines. If this is accompanied by arching in the middle of the nail, this is not normal. If the condition does not clear up on its own over a period of two months or so, then I would recommend your client see a dermatologist. Some form of treatment may be required.