Brittle or fragile nails are common and often aren’t a sign of a serious illness. More often, they’re related to frequent exposure to water, chemicals, aging, or minor nutritional issues. Occasionally, they can point to an underlying medical condition.
Here are some possible causes:
1. Frequent water or chemical exposure (most common)
Repeated handwashing, dishwashing, or use of cleaning products can dry out nails, making them split or peel.
2. Aging
Nails naturally become drier and more brittle with age.
3. Iron deficiency
Low iron levels can lead to brittle nails and, in some cases, spoon-shaped nails. Symptoms may also include fatigue, pale skin, or shortness of breath. This may be related to Iron deficiency anemia.
4. Vitamin or mineral deficiencies
Inadequate intake of nutrients such as biotin, zinc, or protein may contribute to nail changes, although deficiencies are a less common cause than many online articles suggest.
5. Thyroid disorders
An underactive thyroid (Hypothyroidism) can cause dry, brittle nails along with symptoms like fatigue, weight gain, dry skin, and feeling cold.
6. Skin conditions
Conditions such as Psoriasis or Eczema can affect the nails, causing pitting, thickening, or brittleness.
7. Fungal nail infection
A Onychomycosis can make nails brittle, thickened, discolored, or crumbly.
What you can do
- Keep nails moisturized with hand cream or cuticle oil.
- Wear gloves when cleaning or washing dishes.
- Eat a balanced diet with adequate protein, iron, and other essential nutrients.
- Avoid harsh nail products and excessive use of acetone-based nail polish removers.
When to see a healthcare professional
Consider an evaluation if:
- Brittle nails persist despite good nail care.
- Only one nail changes significantly.
- Nails become thick, discolored, or painful.
- You have other symptoms such as fatigue, weight changes, hair loss, or swelling.
- The nail separates from the nail bed or you notice bleeding.
Bottom line: Brittle nails are usually caused by everyday wear and tear or dryness, not a serious disease. However, if they’re persistent or accompanied by other symptoms, it’s worth discussing them with a healthcare professional, who may recommend tests such as iron studies or thyroid function tests depending on your overall symptoms.
