Nail Pitting [Causes, Symptoms, Home Remedies & Best Treatment!] What causes nail pitting? The most common causes include: #1) toenail and fingernail psoriasis, #2) atopic dermatitis & Others! Remedy & Treat IT At HOME! Toe Nail Pitting Causes: The #1 cause of nail pitting is psoriasis. What we do know is that a good percentage … Read more