Extensions and weaves are a lot like ponytails and braids. Over time, they can leave hair broken and brittle. The difference is the damage is at the roots where it is harder to cut out.
“If you have a discomfort or ache in the scalp, that indicates that what you’ve done to your hair is causing too much pressure at the roots,”
Worse, traction alopecia is a serious hair loss condition caused by wearing tight hairstyles like extensions for too long a time period. So either keep it loose, or try growing your hair instead of going for instant length.