Are black streaks in nails always a cause for concern?

Black streaks in nails, called melanonychia, can happen for different reasons. Sometimes, these streaks are present from birth, which is known as congenital longitudinal melanonychia. This is generally not a cause for concern and is considered a normal variation.

Melanonychia can also occur during pregnancy. This is often due to hormonal changes and is usually temporary. Pregnant individuals might notice these streaks appearing or becoming more pronounced.

However, it's important to be aware that while many cases of melanonychia are harmless, there can be situations where it might need further examination. If the streaks change in appearance, such as becoming wider or darker, or if they are accompanied by other symptoms, it might be a good idea to consult a healthcare provider for evaluation.

In summary, while black streaks in nails are not always a cause for concern, monitoring any changes and consulting a healthcare provider if needed is a good practice.