Waking up with knotty hair? It’s usually friction against your pillowcase....
https://wiki-byte.win/index.php/How_Do_I_Keep_Long_Hair_From_Getting_Rough_and_Dry_Overnight%3F
Waking up with knotty hair? It’s usually friction against your pillowcase. Cotton can be rough, so switching to silk helps minimise breakage. Another simple habit is wearing a loose, low bun or braid to keep your hair smooth and protected while you sleep.