Horizontal grooves on big toe nails may be due to nail malnutrition, trauma, onychomycosis, hyperthyroidism and other factors.
1. Nail malnutrition: prolonged partiality, picky eating, resulting in the lack of nutrients in the body, resulting in nail malnutrition, which will make the big toe nails have horizontal grooves, but also appear white spots, layering and other abnormal manifestations.
2. Trauma: trauma to the nail area, such as heavy objects or excessive pressure, will make the big toe nails have horizontal grooves, may also be accompanied by pain, swelling and other symptoms.
3. Onychomycosis: Usually caused by fungal infection, fungus destroys the nail bed or other tissues of the nails, which may lead to nail damage, resulting in horizontal grooves on the big toe nails, and in severe cases, the nails may be separated and the nail plate may partially fall off.
4. Hyperthyroidism: the presence of hyperthyroidism can lead to abnormal secretion of thyroxine in the body, which will affect the nails, resulting in the nails of the big toe localized horizontal grooves, which may also be accompanied by thickening of the nails, separated from the nail bed, limb weakness and other symptoms.
There may also be other reasons for the grooves on the big toe nails, so it is recommended to go to a regular hospital in time to get a clear picture of the cause of the problem, and then under the guidance of the doctor to target the treatment.