The violence in Tripoli has killed 1,093, including 106 civilians, and injured 5,752 others, including 294 civilians, with over 100,000 displaced, according to a WHO tweet.
"WHO is training Libya's doctors to serve both the physical and mental health needs of the injured and displaced," the tweet said.
The east-based army, led by Khalifa Haftar, has been leading a military campaign since early April to take over Tripoli, where the UN-backed government is based.
Libya has been struggling to undergo a transitional period amid chaos since the fall of former leader Muammar Gaddafi in 2011.