Nail issues are very common, affecting as many as 20% of people. The medical term for this condition is onychoschizia if the splitting is horizontal and onychorrhexia if the splitting is longitudinal. The two conditions together are referred to as "brittle nail syndrome". There are many causes of weak brittle nails ranging from benign to more serious. The most common cause is frequent exposure to water as in washing dishes, cleaning, swimming, etc. as the process of wetting and drying causes the nails to become brittle. Vitamin and mineral deficiencies have also been shown to be a cause of brittle nails so your diet might be contributing to your symptoms. The most common deficiencies include B complex vitamins (especially biotin), calcium, and zinc. Other medical conditions that can cause brittle nails include anemia (low blood count), thyroid disorders, and certain skin disorders such as lichen planus or psoriasis
. It is important to see your primary care doctor
to determine the cause of your symptoms and discuss the appropriate treatment. In the meantime protect your nails by wearing gloves when washing dishes or cleaning, avoid prolonged exposure to water such as swimming, take a multivitamin, avoid nail polish and removers, and use a moisturizer.