Thick and hard big toe nails can be caused by congenital onychomycosis, fungal infections, diabetes and other factors.
1. Congenital Thick Nail Syndrome: usually related to genetic factors, it can lead to thickening and hardening of the nails, and will gradually aggravate, and is prone to cause various complications if left untreated for a long period of time, such as onychomycosis and necrosis of the nail ends.
2. Fungal infection: big toe nail fungal infection, will cause gray nail, long time without treatment, will lead to big toe nail is very thick and hard, with itching and other symptoms, but also easy to induce ingrown toenail, nail groove inflammation and other complications.
3. Diabetes: Prolonged diabetes may lead to vascular circulatory disorders, which will reduce the blood supply to the toenail area, and then cause big toe nails are thick and hard, accompanied by fatigue, drinking, eating, urinating and other symptoms.
If you have thick and hard big toe nails, it is recommended that you seek medical examination and treatment as soon as possible to avoid aggravation of the disease.