Jordan Peterson has revealed that he experiencing pain "everywhere," although he is yet to discover the source of the issue.

The clinical psychologist and author made an appearance on Bill Maher's Club Random podcast, during which the host enquired about his guest's health.

"You feel good?" Maher asked, garnering a positive response. "You feel like you're all over that?"

Responding to the second part of the question, Peterson said: "No, I have a lot of pain. But not compared to what I did. You know, my head's clear."

When asked where his pain was, Peterson told Maher that it was "kind of everywhere," explaining: "If you have the flu, you know what it's like, you ache. It's like that."

"Why do you have that?" Maher asked, to which Peterson responded: "I have no idea."

When Maher enquired about "medical experts" uncovering the issue, Peterson said: "No. It's probably [an] immunological reaction."

"You look healthy," Maher later told his guest as they went on to discuss other topics.

Peterson has been open about his health issues in the past. In February 2020, the academic admitted himself into an "emergency" detox center in Moscow, after difficulty weaning himself off the medication Clonazepam. The drug is used to manage seizures and muscle spasms, as well as to treat mental health conditions such as OCD and panic disorder.

His daughter Mikhalia Peterson reported that her father suffered from a "severe case of pneumonia" during his time at the facility, and was placed into a medically induced coma for eight days to help him recover.

"He's had to spend four weeks in the ICU in terrible shape, but, with the help of some extremely competent and courageous doctors, he survived," she said in an online clip. "The uncertainty around his recovery has been one of the most difficult and scary experiences we've ever had."

Jordan Peterson said in a 2019 interview that his wife, Tammy Peterson, had been given months to live after being diagnosed with a Bellini tumor, a type of rare metastasis. Doctors initially believed she had a less aggressive form of cancer, but surgery to remove part of her kidney revealed the severity of the condition.

The cancer had spread to her lymph nodes, but the second surgery successfully removed the tumor. Tammy Peterson spoke earlier this year about how her faith and spirituality have helped her deal with the disease.

In 2022, Mikhalia Peterson confirmed that her father had checked into a rehab facility in New York.

Posting a video to YouTube, the influencer explained that the author was suffering from "horrific" discontinuation symptoms from Clonazepam.

Jordan Peterson has previously discussed living with depression and was prescribed the benzodiazepine after his wife's cancer diagnosis in April 2019. Jordan Peterson also put the tour to promote his book -- 2 Rules for Life: An Antidote to Chaos -- on hold. He also postponed his following title, Beyond Order.

After his wife's condition appeared to improve, Jordan Peterson moved to wean himself off Clonazepam. However, the process did not go as planned, with Mikhalia Peterson describing her father as "like a lost puppy."

"I've never seen my dad like this," she said in the video. "He's having a miserable time of it. It breaks my heart."