Weak or Brittle Nails: What Might Your Body Be Telling You?
Brittle nails are very common, especially with aging, and they don’t automatically mean you have a vitamin deficiency or serious disease. Frequent exposure to water, detergents, hand sanitizer, nail polish/remover, and repeated trauma can make nails split and break.
Possible underlying causes
- Iron deficiency — especially when nails become thin and spoon-shaped (concave).
- Thyroid disorders — can cause thin, brittle, slow-growing or separating nails.
- Fungal infection — more likely when nails become thick, yellow, crumbly or distorted.
- Psoriasis or other skin conditions — can cause pitting, splitting and changes in nail texture.
- Poor nutrition — inadequate protein or certain nutrients can affect nail growth, although brittle nails alone don’t prove a deficiency.
- Normal aging — nails commonly become more brittle as we get older.
🧴 What you can do
Keep nails reasonably short, moisturize your hands and nails regularly, and wear gloves when doing dishes or cleaning. Excessive water exposure can weaken nails and make them split or peel. Avoid using nails as tools and don’t aggressively cut or push back the cuticles.
🚩 When to have them checked
See a doctor or dermatologist if the change is new, persistent, affects several nails, or comes with pain, swelling, nail separation, major color changes, or significant thickening. A new dark streak running along a nail deserves particular attention because, although uncommon, it can be a sign of melanoma.
