Taking Risks After a Cancer Diagnosis

Medically Reviewed by Jennifer Robinson, MD on August 21, 2014
From the WebMD Archives

If someone you love has been diagnosed with cancer, you want to see him do everything he can to stay healthy and safe. So it can be confusing or upsetting if he does things that seem risky. But experts say unexpected behavior is a normal part of the way some people handle their diagnosis.

“Facing a life-threatening illness can shift your perspective, both in the short- and long-term,” says Jeremy Winell, MD. He's the director of cancer supportive services at Mount Sinai Beth Israel Cancer Center in New York City. “Some changes in behavior and attitude are to be expected.”

Research shows that cancer survivors are more likely to make positive health changes than negative ones. But if your loved one is doing something that concerns you, try to put his behavior into perspective -- and learn when to take action.

One Person’s Risk Is Another Person’s Bucket List

Truly risky behavior -- like having unprotected sex, or driving 90 miles an hour -- is a rare reaction to cancer.

“In 30 years of practice, I can’t recall a time that a patient did something dangerous in response to their diagnosis,” says Stewart Fleishman, MD. He's a psychiatrist, palliative care specialist, and author of Learn to Live Through Cancer.

More often, experts say, a cancer diagnosis reminds people how short life is. They may feel the need to do things they always wanted to do but had been putting off, like driving a race car or going sky diving. Many survivors decide to change careers, and some even choose to end relationships with their significant others.

Should you worry? Winell says most of the time, there’s no need.

“Their loved ones may get concerned, and feel like the patient’s having a personality change, when in fact they’re doing something normal and not necessarily unhealthy,” he says.

Addictive Behaviors Are Hard to Shake

Some people will turn to unhealthy ways to deal with their diagnosis, though, especially if that’s how they tend to handle anxiety. Cancer can be extremely stressful, after all.

“That’s why it can be hard to give up so-called risky behaviors that people use to cope with stress, like smoking, drinking too much alcohol, doing drugs, or even overeating in the middle of treatment,” says Diane Robinson, PhD. She’s a neuropsychologist and director of the cancer support community at the University of Florida Health Cancer Center-Orlando Health.

A person’s struggles with substance abuse can get even worse if he’s stressed out. That may be why a recent American Cancer Society study shows that about 1 in 10 cancer survivors continues to smoke.

“If you’ve never been a smoker, it may seem shocking that someone wouldn’t do everything they can to reduce their risk of getting cancer again,” says study author Lee Westmaas, PhD. He's the director of Tobacco Control Research at the American Cancer Society. “But nicotine is incredibly addictive and actually changes brain chemistry in ways that can make it difficult to quit.”

Many people living with cancer find healthy ways to ease stress, though. If your loved one hasn’t yet, gently encourage him to talk to his doctor. Smokers can get free, cancer-oriented support at and 800 Quit-Now.

Stay Supportive

If your loved one is doing things that put her life, or someone else’s, in danger, it may mean she’s depressed and may feel hopeless.

“If they’re looking at cancer as a death sentence, they may be driven to do things that aren’t good for them,” Winell says.

Encourage her to seek help from a medical professional who’s familiar with her diagnosis and treatment plan.

“Most cancer centers around the country have support groups and other free programs that can help cancer patients work through emotional struggles,” Winell says. (The American Cancer Society also has more resources.)

Often times, the best way to help a person with cancer is just to listen.

“When you have cancer, it can feel like everyone has an opinion,” Winell says.

Take the time to hear what’s motivating your loved one to do risky things. More importantly, Winell says, it shows him that you’re there for him -- and that kind of social support can boost the odds he’ll make healthy choices.

Show Sources


Jeremy Winell, MD, director of Cancer Supportive Services, Mount Sinai Beth Israel Cancer Center, New York.

Hawkin, N.A., Journal of Cancer Survivorship, March 2010.

Stewart Fleishman, MD, psychiatrist and palliative care specialist; author of Learn to Live Through Cancer, Demos Health, 2011.  

Diane Robinson, PhD, neuropsychologist, director of the cancer support community, University of Florida Health Cancer Center-Orlando Health.

American Cancer Society: “Counseling Services You May Need.”

Westmass, L. Cancer Epidemiology, Biomarkers & Prevention, August 2014.

Lee Westmaas, PhD, director of Tobacco Control Research, American Cancer Society.

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