You asked: How long should you keep crochet braids in your hair?

Typically crochet braids last between four to six weeks, and you can always leave the center in a little longer and touch up the front (aka the parameters of your hairline) so it looks fresh.

Are crochet braids bad for edges?

The popular braid pattern of braiding the hair straight back is damaging to the edges. This braid pattern will make your hairline recede. The weight of the fake hair hanging on the cornrow base of your natural hair sometimes leads to breakage. Especially when people leave crochets in for 3 months or more.

ON A NOTE:  You asked: What can I use to reduce facial hair growth?
Hair and eyelashes