Almost immediately, the rumor mill began running overtime: Hong Kong triads, a family curse, and even poisoning were all blamed for his death. That the married star had died in the house of his secret girlfriend, Betty Ting, fueled more rumors. More speculation surfaced in 1993, when Lee's actor son Brandon Lee died after being shot by a faulty prop gun on the set of The Crow.
In the 45 years since Bruce Lee's death, scientists, biographers and fans continue to speculate about what caused his cerebral edema, poring over the facts and rumors alike. Here's what we actually know about Bruce Lee's tragic death.
Officially, Lee's death was caused by a cerebral edema, a swelling of the brain caused by excess fluid. Although Lee's brain had swelled nearly 13 percent, the coroner found no evidence of external injury. So what caused the edema?
Signs of his poor health first appeared in May 1973, just weeks before Lee's death. Suffering from headaches and seizures, he was rushed to hospital, where he was diagnosed with his first cerebral edema. Lee didn't regain consciousness until the next day, when he flew to UCLA Medical Center for further testing. According to the Matthew Polly biography Bruce Lee: A Life, doctors diagnosed the actor as having suffered a grand mal seizure, but couldn't identify the cause. After the swelling subsided Lee appeared to be back in perfect health and was given the all clear. Shortly thereafter, he left the U.S. for an extended visit to Hong Kong.
July 20 started out like any other, except perhaps for the heat—it was 90 degrees, a humid summer day in Hong Kong. Lee spent the morning at his studio, discussing his upcoming film Game of Death. He ate a small amount of hash with a friend (Lee believed cannabis expanded his consciousness) before heading to Betty Ting's apartment in the early afternoon. According to Polly, the pair spent the next few hours having sex and consumed more hash. Raymond Chow, who was producing Game of Death, arrived at the apartment around 6pm. Already, Lee's ill health was apparent. "Bruce wasn't feeling very well," Chow told Polly. "I think we had some water… In telling the story [of Game of Death], he acted out the whole thing. So, that probably made him a little tired and thirsty. After a few sips he seemed to be a little dizzy."
Lee complained of a headache, so Ting gave him Equagesic, a combination tranquilizer and analgesic that he had purportedly taken before. He went to lie down in her bedroom but about two hours later, when Ting went to wake him, he was nonresponsive.
By the time the paramedics arrived, Bruce Lee was dead.
A full autopsy took place at Hong Kong's Queen Elizabeth Hospital a few days later. The medical examiner, Dr R. R. Lycette, found no signs of foul play but noted the hash and Equagesic in Lee's system. Lycette identified "congestions and edema of the brain," as the immediate cause of death but couldn't account for what caused the swelling.
In addition to his intense fitness regimen, Lee kept to a strict diet of vegetables, rice, fish and milk, and avoided refined flour and sugars. While he enjoyed marijuana, he didn't smoke cigarettes or drink alcohol or coffee. Still, the fact that he survived his first edema was miraculous; this time, he hadn't been so lucky. Cerebral edemas are extremely dangerous and can be caused by any number of factors, including head injuries, allergies and brain tumors. Questions still remain about how such a healthy young man could so suddenly and inexplicably die.
"I believe the most likely cause of death is cannabis intoxication," Lycette wrote in a letter, "either due to drug idiosyncrasy or massive overdose." But there has been no links between cannabis and cerebral edemas, and most researchers question whether it's even possible to fatally overdose on marijuana.
In September 1973, two months after Lee's death, forensics expert Donald Teare was assigned to the case. Teare, who carried out the autopsy of Jimi Hendrix just three years earlier, asserted Lee had a "hypersensitivity" to the active ingredients in Equagesic that led to his death. However, some people still believed that it was the hash, rather than the Equagesic, that killed the star. The doctors who treated him in May noted Lee had consumed hash that day, too. "We gave Bruce a long talk before he was discharged from hospital, asking him not to eat hashish again," said Dr Peter Wu in the 2000 biography The Tao of Bruce Lee. "We told him that his very low percentage of body fat could make him vulnerable to drugs." Wu also cautioned that his stress levels could dramatically magnify the effects of the hash. "Since he'd already had a very bad time with the drug, we told him that the effects were likely to be worse next time."
It's possible that Lee was hypersensitive to one or more of the drugs found in his system, but he had reportedly consumed them before with no ill effects. So could something else have killed Bruce Lee?
Over the years, a wide range of theories have emerged: At a comic convention in 1975, Chuck Norris, Lee's Way of the Dragon co-star and a pallbearer at his funeral, speculated Ting had given him antibiotics that reacted with medication Lee was taking for back pain. That theory was contradicted by Lee's autopsy, but it illustrates just how much misinformation was swirling around his death. Some blamed everything from bad feng shui to a magical curse, while others believed Lee's "death" was simply a hoax to promote Game of Death .
Advances in medicine since Lee's passing have led to even more conjecture about why he died: At a 2006 meeting of the American Academy of Sciences, medical examiner James Filkins postulated that Lee suffered a fatal epileptic seizure. SUDEP, or "sudden unexplained death in epilepsy," refers to the unexpected death of a seemingly healthy person with epilepsy, when no cause of death can been determined. But it wasn't coined until 1995, more than 20 years after Lee died. Seizures can be triggered by stress, which Lee was certainly under, but there's no record of him ever being diagnosed with epilepsy.
Polly offers another explanation: Bruce Lee died from heatstroke. In Bruce Lee: A Life, Polly claimed Lee had the sweat glands in his armpits removed so he would appear less sweaty on camera, and that after playing out all those fight scenes on a sweltering hot day in Hong Kong, his body gave out. Lee's symptoms on the day he died, including dizziness and headaches, are consistent with heatstroke, and cerebral edemas are often found in autopsies of people who have died of heatstroke. What's more, Lee's first edema in May took place in a hot editing room that lacked air conditioning. Like epilepsy, heatstroke was less well-researched in 1973 than it is today, so it could have slipped past the doctors.
If true, this theory is perhaps more tragic than any other for its sheer preventability: In chasing success and physical perfection, Bruce Lee neglected to care for his body in one of the most fundamental ways possible.
