Godan verb with 'ru' ending, Intransitive verb
to have a cramp; to twitch; to spasm
顔がひきつります。My face twitches. to stiffen (of a face, expression); to freeze; to grow tight (e.g. of a voice)
to shrink (of skin, due to a scar); to tauten
Also written 引き攣る【ひきつる】