A massive fire broke out in a Queens beauty salon overnight, leaving seven firefighters hurt.

The blaze at 136-15 37th Ave., near Main Street in Flushing, has gone to seven alarms, with more than 200 firefighters on scene, an FDNY spokesman said.

The fire at the three-story, 20 by 80 structure began about 11:50 p.m. Friday, engulfing Eunice Beauty Salon and extending into the adjacent building, the FDNY said.

Seven firefighters were taken to area hospitals with minor injuries, an FDNY spokesman said, adding the cause of the blaze was “under investigation.”

Main Street between Northern Boulevard and 39th Avenue was closed while FDNY battled the blaze, the NYPD said.