What causes your fingernails to grow curled?

Curled fingernails can be caused by various factors, including genetics, underlying health conditions, and environmental influences. Conditions such as fungal infections, psoriasis, or thyroid disorders can contribute to abnormal nail growth. Additionally, improper nail care or frequent exposure to harsh chemicals may lead to changes in nail shape. If the curling is significant or accompanied by other symptoms, it may be advisable to consult a healthcare professional.