Possible reasons for the appearance of horizontal lines on the toenails include nail fungus disease, nail malnutrition, trauma and so on.
1. Nail fungal disease: toenail fungal infection can lead to the occurrence of nail fungal disease, which is what we usually call gray nails, thus causing the surface of the toenail becomes rough, appear more horizontal lines, nail thickening, yellowing and a series of nail lesions, lesions have a certain degree of contagiousness, the patient is often accompanied by tinea pedis and other fungal infections.
2. Nail dystrophy: it is related to many factors, such as heredity, skin disease, systemic disease, physical injury, chemical stimulation, etc. It can lead to the morphology and structure of the nail. It can lead to changes in the morphology and structure of the nail and the appearance of transverse nail lines.
3. Trauma: If the toenail is smashed by heavy objects, violent extrusion and other traumatic situations, it can lead to local nail morphology changes and the appearance of transverse nail lines.
To summarize, there are many reasons that can cause the occurrence of toenail striae, and it is recommended that patients go to the hospital in time to get a clear diagnosis.