A lot of times this is caused by improper mulching, construction, or poor planting practices. Oftentimes an Arborist can correct these issues by carefully excavating the debris from the tree and removing any girdling roots that have wrapped around the stem.
Girdling roots are considered any root that is hindering the flow of nutrients to the canopy of the stem. It is safe to remove these roots without harming the tree when the service is performed by an experienced technician. This issue if left unchecked usually results in the plant’s death. Signs that your trees and shrubs may have girdling roots are die-back in the upper canopy of the plant.