Why Am I Losing Hair Around My Belly?

ive had steady hair loss around my belly button hair area for about 2 years now, it just keeps getting thinner & continues on a steady pace. i dont care all that much about losing hair in that area, but my concern is the reason for it & will it spread to other areas? is this normal? thank you

Often the belly is an area that is rubbed by belts or articles of clothing. These can cause traction alopecia. Have you gained weight and increased your belly size?