Cancer treatments can cause changes to fingernails and sometimes toenails, too. These side effects are temporary for most people, and regular nails typically grow back after the prescribed cancer therapy is complete. During treatment, brittle nails can cause discomfort, and if left uncared for, can sometimes lead to infection.
There are not medications that specifically prevent or treat weak nails, but simple, at-home remedies can help manage this side effect. Natural oils, like avocado and olive oils, can help hydrate and strengthen nails, and protective gloves or band-aids can be worn to prevent additional dryness or breakage.