You are a powerful genius. If you can do that, you can do anything.

I knew that I was essentially well within the first two hours of doing the lightning process.

The thought that perhaps my brain could be driving these symptoms was terrifying.

I'm afraid now we've strayed very, very far from neuroscience,

what I would call neurobolics.

Why do some people catch common infections and fail to get better months or even years later?

I've always been really fit, really healthy. It's a mystery that's plagued science and

tormented patients and it might be closer than ever to being cracked.

But while uncertainty remains, unproven treatments continue to fill the gap.

This is the documentary from the BBC World Service. I'm Rachel Shrayer with BBC Trending.

We do in-depth reporting on the world of social media.

I've been investigating a treatment program targeting long COVID patients online.

Its author claims a wealth of evidence suggests its special process can help people recover, using their thoughts to change their bodies.

They charge a lot of money for their courses, but it's been described by a range of medical

experts as pseudoscience.

I'm sat in my gym at the bottom of my garden.

It's a painful reminder actually of the person that I used to be and the life that I used to have.

Sarah is a science teacher from the middle of England. She has long COVID, a condition where people suffer an array

of sometimes disabling symptoms months after a coronavirus infection.

Symptoms include fatigue, breathlessness and erasing heart when standing.

Fatigue just doesn't hit it. It's like a total body depletion. It's an umbrella term to describe any long lasting health problems linked to a COVID infection. In reality it probably describes several different

conditions. Some people say it feels like they're being poisoned, it does feel

...