Possible causes of the nail becoming yellow are listed below.
External substances
- Tabaco
- Nail hardener
- Nail lacquer
Drugs
- Tetracycline
- D- penicillamine
- Vitamin D3
Skin disease
- Psoriasis
- Pustulosis palmoplantaris
- Alopecia areata
- Fungus infection
- Trichophytosis
- Onycholysis
Systemic disease
- Bile secretion disability
- Lung and heart diseases (Causes the skin below the nail to swell and disrupt blood flow)
- Hypometabolism
- Lympathic problems
- Internal diseases
- Diseases of the Bronchi and lungs
- Thyroid disease
- Carotenosis
- Yellow-nail syndrome
- Diabetes
- Heart failure
- Hyperbilirubinemia
- Amyloidosis
- Sjogren’s syndrome
- AIDs
Any of these diseases are conditions which cannot be taken lightly. It’s recommended to visit a medical professional.