Keep nails and cuticles moisturized daily with hand cream, cuticle oil, or petroleum jelly
Avoid biting, picking, or aggressively buffing the nails
Wear gloves when washing dishes, cleaning, or using chemicals
Eat a balanced diet with enough protein, iron, zinc, biotin, and vitamins A, C, D, and B12
Drink enough water to stay hydrated
Use a gentle nail file and file in one direction
Limit frequent use of gel, acrylics, and harsh nail polish removers
Give nails breaks between manicures
Protect nails from repeated trauma or pressure
Treat underlying health issues if present
See a doctor or dermatologist if the lines are new, worsening, painful, or affecting several nails