For Queen guitarist Brian May, this Christmas proved to be a difficult one after the rocker was forced to undergo “urgent tests” over fears he could have cancer.

May shared on his official website Saturday that his doctor had organized several scans after he complained of severe back pain earlier this month.

Results of an MRI showed there were “abnormalities in the bones,” leading to even more tests for the 66-year-old.

"So around Christmas I've been having a succession of blood tests, ultrasounds, and various kinds of scans, to see if they could rule out various kinds of cancer,” May wrote to his fans.

"Now, on hearing the 'C' word something happens inside you … of course. I've seen so many of my dear friends fighting it … and my Dad lost his battle at age 66, exactly the age I am now,” he continued.

"So over the last few days I've been in various states of unrest."

On Monday, May took to the site again, this time to thank fans for their outpouring of support.

“I've been overwhelmed by the amazing messages you've been sending me, folks, since I wrote about my 'Health Scare'. It's taken me by surprise – for many reasons," he said.

"I really didn't realise how much you guys were gunning for me … it's great to know that.

The rocker also added: "But I didn't realise that biting the bullet and mentioning the 'C' word would unlock such an avalanche. I now realise that so many of you have been wrestling with this all along, personally, or in family or friends, and, like me, found it hard to share.

“Hearing of your experiences, and courage, and hopes, and solutions, has been a massive eye-opener for me."

The English musician shares that he will continue preparations for an upcoming tour as he awaits the results of future tests.

For now, May is getting plenty of love from his wife of 13 years, actress Anita Dobson, and his three children.