Dustin Diamond fears his cancer could have been caused by staying in cheap hotels.

Dustin Diamond

Dustin Diamond

The 'Saved by the Bell' star was recently diagnosed with stage four small cell carcinoma, which is commonly referred to as advanced lung cancer, and Dustin is puzzled by how he got this type of cancer as it's normally caused by smoking and he is not a smoker.

His representatives told TMZ that Dustin is questioning whether staying in cheap hotels for work could have caused the illness, as he fears some may have had asbestos, which he may have breathed in.

Meanwhile, Dustin’s team recently confirmed the actor – who played as Samuel 'Screech' Powers in the hit sitcom – has now completed his first round of chemotherapy, and have said he will be undergoing physical therapy soon.

They also insisted he is keeping a positive outlook and is looking forward to spending more time with his girlfriend, after he was hospitalised last week.

However, it was recently reported the 44-year-old star was “going through a lot of pain” amid his health battle.

A source said: “It’s not good, it’s not good at all. He’s going to be in the hospital for a while. He’s getting through his treatments now. It’s tough, it’s very hard. He’s going through a lot of pain, but he still keeps his spirits up. Right now, he’s just suffering. He has his ups and downs where he’s great one minute, but then he can be in a lot of pain - tears. It’s such an emotional time.”