Discoloured toenails can be caused by various factors, from harmless cosmetic staining to underlying health conditions. Understanding the difference is key to proper care.
Common causes of toenail discolouration
Toenail discolouration can result from:
- Cosmetic staining: Nail polish, dyes, or external substances.
- Trauma: Injury to the nail bed, often leading to bruising or blackening.
- Fungal infections: Yellowing, thickening, or crumbling nails.
- Medical conditions: Psoriasis, diabetes, or liver disease.
When to seek professional help
If discolouration is accompanied by pain, swelling, or changes in nail texture, consult a clinician. Persistent discolouration without an obvious cause also warrants medical attention.
Practical takeaway
Inspect your toenails regularly for changes in colour or texture. Avoid prolonged use of dark nail polish and ensure proper foot hygiene. If in doubt, seek professional advice to rule out underlying conditions.
Further reading
For more information on nail health, visit Mayo Clinic’s guide to nail disorders.