Persistent nail pain with brittleness may indicate underlying nail matrix inflammation, micronutrient deficiency (like iron, biotin, zinc), or rarely, an early manifestation of nail psoriasis or lichen planus. Your ongoing supplements (Ferdefol and Perfectil) are appropriate, but lack of improvement suggests a deeper etiology.
Next Steps
An online consultation with a dermatologist is advised to evaluate the nail morphology, rule out systemic associations, and plan further investigations like nail biopsy or blood tests if needed.
Health Tips
Avoid frequent wetting, trauma, or harsh chemicals on nails. Continue your supplements, and keep nails trimmed and moisturized. Nail pain should never be ignored if persistent.