His health troubles started just a few months after his eldest son Cameron – from his first marriage to Diandra Luker – was jailed for drug possession and dealing.
The actor admitted he initially believed his disease had been triggered by the stress over his son’s legal troubles.
Douglas was diagnosed with stage four of the disease and underwent an intense course of chemotherapy and radiation.
Eventually, he was given the all-clear, although he still has to undergo check-ups with doctors every six months.
However, the actor is optimistic he has conquered the disease once and for all.
‘With this kind of cancer, 95 per cent of the time it doesn’t come back,’ he said.
Family man: Michael with his wife Catherine Zeta-Jones and their two children Dylan and Carys
However, he has since denied that he was a sex addict, insisting that he was being treated for alcohol abuse.
HPV is a sexually transmitted virus which is more widely known as a cause of cervical and anal cancer.
Last year, Cancer Research UK said the rising rates of HPV16-positive cases of oral cancer could be linked to oral sex.
Michael Douglas has claimed that his throat cancer was caused by performing oral sex on women.The star, who fought a six month battle with the disease from August 2010 until January 2011, had initially believed that it was his years of smoking and drinking that had lead to the illness.
Opening up, Michael Douglas, pictured on the Graham Norton Show last week, has spoken about the causes of his throat cancer Hollywood Michael Douglas has claimed that his throat cancer was caused by performing oral sex on women