Regular exposure to chemicals and harsh conditions can make nails brittle and prone to splitting. Fungal infections and hypothyroidism, which reduces hormone production, can also lead to nail splitting. If you experience unexplained weight gain, fatigue, or low mood, hypothyroidism might be the cause. Split nails can also signal deficiencies in biotin, protein, or iron. Frequent hand washing, contact with cleaning products, and cold or dry weather can weaken nails. Wearing gloves, using moisturizers, and maintaining a balanced diet can help prevent these issues. Nail hardeners and keeping nails at a moderate length may also reduce splitting and cracking.
