The reasons for not growing nails include nail fungus disease, lack of trace elements or vitamins, anemia, and poor lifestyle habits. 1. Nail fungal disease: it is caused by one or more kinds of fungal infections such as ringworm, yeast and mold, which manifests itself as lesions on the nail plate and/or under the nail, such as turbidity, thickening, separation, atrophy, shedding, buckling and other symptoms. 2. Lack of trace elements or vitamins: If there is a lack of calcium, selenium, zinc, vitamin A and other substances, the growth of nails will also be affected, or even no growth. 3. Anemia: Anemia may lead to malnutrition of the body, which affects the growth of nails. 4. Bad habits: Bad habits such as frequent nail biting and touching unhygienic substances with hands may also lead to non-growth of nails. Not growing nails may also be caused by other reasons, it is recommended that patients seek medical attention in a timely manner, improve the relevant examination to clarify the cause of the disease, targeted treatment.