Hailey Bieber comes out swinging against trolls mocking Justin Bieber for Lyme disease

The model called out commenters mocking her husband's diagnosis.

"Making fun of and belittling a disease you don’t understand is never the way, all it takes is educating yourself," she added.

Despite being on the receiving end of some derogatory insults, the "Sorry" singer also received an outpouring of support from fans and fellow celebrities, like Avril Lavigne, who are all too familiar with the disease.

"So sorry to hear about @justinbieber having to go through this awful disease. The fact that it’s hard to diagnose and is so debilitating was something I suffered through also," tweeted Lavigne shortly after receiving thanks from Hailey Bieber for spreading awareness about Lyme disease via The Avril Foundation.

"Thank you for all you do to educate people about Lyme. You’re amazing," she wrote.

The model also expressed gratitude to Yolanda, Bella and Gigi Hadid for "bringing me so much clarity and information on Lyme disease and for helping answer my questions about course of action, symptoms etc."

Lyme disease is a tick-bone illness that infects around 30,000 Americans annually, according to the Centers for Disease Control and Prevention. The most common symptoms of Lyme are the tell-all bull's eye rash, fever and chills.

If left untreated, however, the disease can spread to other parts of the body and potentially cause neurological problems, temporary facial paralysis, nerve pain and arthritis.