See a Dermatologist or skin specialist.
2. How can I prevent split fingernails?
Keep your nails dry
Repeated or prolonged contact with water is to be avoided. Use cotton-lined rubber gloves while washing dishes, cleaning or using harsh chemicals
Long soaks in the tub are to be avoided
Good nail hygiene
Nails are to be kept neatly trimmed, round the tips in a gentle curve
Rub moisturizing lotion into your nails after washing your hands and after removing nail polish
Harsh nail care products are to be avoided
Avoid nail polish removers that contain acetone.
Repair split fingernails quickly and prevent the problem from getting worse, use nail glue or clear polish
3. What causes vertical ridges in fingernails?
Vertical nail ridges extend from your cuticle to the tip of your nail. These are fairly common and are not a health concern. They become more numerous or prominent with age.
If colour change or horizontal ridges arise, then it is wise to visit your doctor
4. Does nail biting cause any long-term nail damage?
Nail biting is unsanitary. It is merely a bad habit that generally causes no long-term damage to your nails. As long as the nail bed escapes damage due to biting nail growth won’t be affected. However, existing infections do not get worse. An unceasing, severe nail biting can be a sign of anxiety or compulsive behaviour. In such a case, a doctor can help you with behavioural therapy.