Gray nails are generally referred to as onychomycosis. Pregnant women with onychomycosis do not need to take treatment if the symptoms are not serious, and the symptoms can be relieved through general treatment. However, if the symptoms are serious, it is necessary to consider the pros and cons and then take medication. Tinea cruris is caused by a fungal infection of the skin, or it may be triggered by factors such as low immunity and poor hygiene habits. If a pregnant woman suffers from ringworm, no special treatment is needed if the symptoms are not serious. You need to do a good job of personal hygiene in your daily life, wear breathable and ventilated shoes, and avoid trauma to the nails. However, if the symptoms of onychomycosis in pregnant women are relatively serious, it is necessary to use topical antifungal drugs, such as terbinafine, under the guidance of a doctor. Pregnant women need to report to their doctors if they feel unwell during the use of the medication.