Cracking in the nail seam may be caused by overstimulation, trauma, nail malnutrition and other factors, which need to be analyzed according to the symptoms.
1. Overstimulation: for example, prolonged contact with chemical substances with hands, resulting in localized irritation, will make the nail cracking, accompanied by pain, swelling and other symptoms.
2. Trauma: For example, if the nail is damaged by a heavy object, the nail will crack, accompanied by redness, pain, swelling, bleeding and other symptoms.
3. Nail malnutrition: it may be related to heredity, bad habits, psoriasis, lichen planus and other factors, which can lead to changes in the shape, thickness, smoothness and other traits of the nails, which can also lead to cracking in the nail seam or nail peeling.
There may be other reasons for cracking in the nail seam, it is recommended to seek medical examination and treatment as soon as possible to clarify the cause and standardize the treatment.