Nails with indented horizontal grooves may be related to trauma, malnutrition, onychomycosis, etc. It may also be nail damage caused by other skin diseases, such as lichen planus and psoriasis.
1. Trauma: trauma to the nails can lead to the appearance of depressions in the nails, which usually disappear with the gradual growth of the nails.
2. Malnutrition: Malnutrition may also cause nails to have depressed horizontal grooves, such as vitamin, calcium, zinc and other deficiencies in the body can lead to nails with depressed horizontal grooves.
3. Ringworm of the nail: ringworm of the nail is caused by fungal infection, when the fungus invades the nail plate, it can lead to changes in the shape and texture of the nail plate, which will lead to the situation of depressed horizontal grooves in the nail.
4. other diseases: some skin diseases such as lichen planus, psoriasis, etc. involve the nails, may also lead to nails have sunken horizontal grooves.
There are many reasons for indentation of nails, it is recommended to go to the hospital in time, under the guidance of the doctor to carry out active treatment.