Bite

Bite is a 2015 Canadian body horror film written and directed by Chad Archibald, and starring Elma Begovic, Annette Wozniak, Denise Yuen, Jordan Gray, Lawrene Denkers, Barry Birnberg, Daniel Klimitz, Tianna Nori, and Caroline Palmer. It was produced by Black Fawn Films, MGM Productions and Scream Factory, and Breakthrough Entertainment. The plot is about a young woman who is bitten by a waterborne insect whilst in Costa Rica and suffers horrifying and transformative consequences.

Synopsis from Wikipedia, CC BY-SA 4.0. Everything below written here.

Poster © the film's rights holders.