3. Nutritional deficiencies
Another common factor is a lack of essential vitamins and minerals , especially:
- Biotin (vitamin B7)
- Iron
- Zink
- Magnesium
As we age, our bodies absorb nutrients less efficiently. This means that even if you eat well, you can still fall short in certain areas – and your nails can be one of the first places you notice this.
If you also suffer from fatigue, thinning hair or slow healing, it may be helpful to talk to your doctor about possible deficiencies.
4. Underlying health problems
In rarer cases, prominent vertical ridges can indicate a health problem that needs attention. Some possible causes include:
- Poor circulation
- Thyroid imbalances (both underactive and overactive)
- Rheumatoid arthritis
- Skin conditions such as eczema or psoriasis
If the nail ridges are accompanied by other unusual symptoms, such as joint pain, changes in skin texture, or unexplained fatigue, it is best to have them checked by a doctor.
When should you see a doctor?
Although vertical ridges are usually harmless, they can sometimes indicate something more serious. Consult a doctor if your nail ridges are accompanied by:
- Dark brown or black streaks under the nail
- Splitting , thickening or peeling of nails
- Redness , pain or swelling around the nail bed
These could indicate a fungal infection , injury , or – rarely – a form of skin cancer called melanoma , which can develop under the nail.
It’s important to detect the problem early. Therefore, never ignore a sudden or dramatic change in the appearance of your nail.
