Judge roughly according to the angle of wear of your own soles: the more serious wear on the inner side is due to eversion of the foot, and the more serious wear on the outer side is due to pronation of the foot.
Severe medial wear is due to hallux valgus, which is mainly caused by heredity, malnutrition, trauma, etc., resulting in underdevelopment of the ankle muscles and bones, causing excessive pronation.
Severe lateral wear is due to inversion of the foot, which is mainly caused by congenital foot deformity, flat feet, etc., so that the muscle strength of the fibularis longus shortus muscle is too strong and the muscle strength of the tibialis anterior and posterior muscles is too weak, resulting in the appearance of outward-facing soles.
If you find serious asymmetry in the wear of the soles, it is recommended to go to the hospital in time, improve the examination, clarify the cause of the disease, and carry out standardized treatment under the guidance of the doctor.