Changes in the nail can signal problems with your overall health. Liver disease, kidney disease, medication side effects, even certain cancers can cause changes in the nails.
Note that excess exposure to water, especially warm water, can dehydrate the skin and nails….and as I have stated many times before, long baths or showers are not good for the skin…and neither is too much cleansing. See the video ‘Cleansers: do they differ? do they matter?‘