Are nails checked in NDA medicals? Will I be rejected if I am suffering from fungal nail problem in my thumb?

Yes, nails are usually checked in NDA medicals. A fungal nail infection (onychomycosis) can generally be treated with drugs and wouldn’t usually lead to a rejection in military recruitment. However, depending on its severity or extent, it could disqualify you by hampering your ability to perform tasks involving the affected hand or finger such as shooting or physical exertion of any kind. An untreated fungal nail infection might result in rejection due to the potential for permanent disability which would restrict you from engaging in activities that are integral for national security operations. So make sure to get medical treatment for your fungal nail problem before appearing for NDA exams!