Brittle nails and dry hair

Hair and nails are made from keratin, so both can look dry or fragile after frequent colouring, bleaching, straightening, hot tools, harsh cleansers, or prolonged water exposure. A diet lacking enough energy or protein can affect new growth, while iron or thyroid problems may produce wider symptoms. The pattern is not diagnostic by itself. Nail thickening, crumbling, yellowing, or separation can point toward a fungal nail infection, which is explained in [Nail Fungus](/conditions/nail-fungus/).

Pause bleaching, chemical straightening, and high heat while the hair and nails recover. Use a gentle shampoo, conditioner on the lengths, and a moisturiser on hands and nails after washing. Keep nails short, file rather than tear them, and wear gloves for cleaning. Eat regular meals containing protein and a range of plant foods. If the change is widespread, sudden, or not improving, a clinician can review your medicines, diet, scalp, skin, and nails and decide whether testing is useful.

Arrange a review for noticeable hair shedding, scalp inflammation, broken hairs with bald patches, or nail changes that persist after reducing damage. Seek prompt care for a painful or draining nail fold, a rapidly changing dark nail mark, or sudden hair loss. These signs can require examination rather than cosmetic care alone.

Ask whether your hair routine could explain the pattern, whether the scalp and nails need examination, whether medicines or nutrition are relevant, and which changes should trigger follow-up.