How do other illnesses affect onychoschizia?

Onychoschizia can be caused by other illnesses or conditions. Trauma or injury to the nail bed may cause the development of this condition. Medical issues like gland disorders, tuberculosis, Sjogren syndrome, and malnutrition can also lead to onychoschizia. Additionally, individuals with skin diseases like lichen planus or psoriasis may be at risk for onychoschizia.