I would like to know if I can still use hair extension/weaves or relax my hair after hair line Lowering Procedure?

Always check with your doctor before if you are not sure.  Extension and weaves are possible but you will have to make sure you have healed enough to not interfere with what you want to do.  Your doctor can guide you.

I would advise against weaves or extensions applied to the hairline or hair near the hairline after this procedure, however using extensions at a distance from the hairline would not affect the results.  Extensions that are not near the hairline really are no different whether one has a hairline lowering or not.

Weaves and extension cause hair loss. This is cause by the pulling of weaves and extension and even though it does this, many women will do it for the short term of up to 5-10 years.  Sooner or later you will lose some or more of your hair from these weaves and extensions. Your call, of course.