Does Night Shift Work Increase the Risk for Lymphoma? | MyLymphomaTeam

Connect with others who understand.

sign up Log in
Resources
About MyLymphomaTeam
Powered By

Does Night Shift Work Increase the Risk for Lymphoma?

Medically reviewed by Todd Gersten, M.D.
Written by Amy Isler, RN
Posted on February 14, 2022

About 15 million Americans work the night shift (or third shift), clocking in around midnight and leaving after the sun rises. In 2021, the demand for night shift workers increased substantially as organizations tried to meet booming consumer demand and work through the supply-chain bottlenecks introduced by the COVID-19 pandemic. Job search website ZipRecruiter reported 14 times more job postings for overnight shifts than there’d been before the pandemic.

Although there are potential perks to working the night shift — higher pay, less traffic, more flexibility, and less distraction — research shows that long-term rotating shift work (working both shifts during the day and overnight) comes with dangerous health consequences. These may include an increased risk for developing cancer, including lymphoma.

This article discusses why night shift work can be dangerous to your health, how third shift work may increase your chances of developing lymphoma, and ways to minimize the risk if you find yourself working the night shift.

How Night Shift Work Can Cause Health Risks

The most dangerous aspect of night shift work is the disruption it has on sleep schedules and the circadian rhythm. In 2007, the International Agency for Research on Cancer declared shift work that involves a circadian disruption as a probable human carcinogen (cancer-causing agent).

A normal sleep pattern includes sleeping when the sun is down and being active when the sun is up. However, during night shift work, this pattern is reversed. This reversal can cause the body to miss critical signals that help keep the immune system strong.

During night shift work, a person may be exposed to artificial light, which is often the main culprit in disrupting circadian rhythms. Specifically, nighttime exposure to artificial light decreases the production of melatonin, a hormone that is triggered during darkness to help us sleep. Among melatonin’s important functions, it helps stop tumor growth and malignancies.

In addition to suppressing melatonin production, a sleep-pattern imbalance can cause the following negative health outcomes:

  • Cardiovascular disease
  • Obesity
  • Gastrointestinal disturbances
  • Anxiety
  • Depression
  • Diabetes
  • Peptic ulcers
  • Chronic fatigue

Night shift workers also tend to develop lifestyle habits that may increase their risk of developing certain health conditions, including lymphoma. These risky behaviors may include:

  • Consuming more energy drinks or caffeine
  • Smoking
  • Routinely using aspirin or ibuprofen
  • Eating an unhealthy diet, which may lead to obesity and a higher body mass index (BMI)

Night Shift Work and Lymphoma

Although research shows a strong correlation between night shift work and increased risk of certain cancers such as breast cancer, there is inconclusive evidence linking routine shift work to blood cancers such as lymphoma.

Studies have shown that, compared to women, men working the night shift have an increased risk of developing non-Hodgkin lymphoma (NHL). This risk difference may be linked to the hormone estrogen and its role in cell division and the circadian rhythm process.

The number of years a person spends working the night shift is also directly correlated with an increased risk of developing cancer. A person’s risk of lymphoma and other blood cancer subtypes increases when they’ve spent more than 15 years in a nighttime career.

With an increase in demand for night shift workers, more research and clinical trials are needed to study the long-term effects of working during the night, especially when it comes to cancer risk and its implications for public health. Research has commonly used female nurses working the night shift as a sample to study the effects of night shift work on different types of cancer, including breast cancer, lung cancer, and colorectal cancer. Other research including men has examined cancer risk, including NHL and prostate cancer, with inconclusive results.

Working the night shift can harm your physical and mental health, especially when you work these hours for many years. Preventive measures and changes to company policies can help keep workers safe. These changes include:

  • Enforcing rules that workers receive an appropriate number of breaks
  • Providing healthy and ergonomic (safe and comfortable) working environments
  • Encouraging routine cancer screenings and follow-up for night shift workers

Minimizing Your Health Risk

Many jobs and careers that are critical to our health, safety, and convenience are for 24/7 operations that require people to work the night shift. Although the dangers of mixing up your sleep schedule and circadian clock are well known, these shifts are not going away. It is important to take steps to protect your health if you work at night, either in the short term or long term.

The best ways to protect your health include:

  • Eating a healthy, balanced diet
  • Limiting your alcohol consumption
  • Getting routine physical activity
  • Minimizing caffeine and energy drink intake
  • Drinking lots of water

These suggestions are recommended for everyone, no matter what time of day you work. There are also helpful tips specific to people who work the night shift. These recommendations include:

  • Blocking out daytime noises with a white noise machine or earplugs
  • Eating your meals at the same time each day
  • Eating high-protein foods to help you stay alert
  • Taking time to relax after work
  • Having a light snack before going to bed
  • Using blackout shades to mimic nighttime
  • Avoiding sleeping pills and other medications that cause drowsiness
  • If you are pregnant, working only one night shift per week

If you enjoy working the night shift, or if your career demands it, try to limit the number of years and number of consecutive shifts that you work. This can help you to avoid the long-term health risks associated with disrupting your natural sleep cycle.

You’re Not Alone

By joining MyLymphomaTeam, you gain a community of more than 10,600 people affected by lymphoma. Members come together to ask questions, give advice, and share their experiences with those who understand life with lymphoma.

Do you think night shift work contributed to your risk of lymphoma? Share your experience in the comments below, or start a discussion on MyLymphomaTeam.

Posted on February 14, 2022
All updates must be accompanied by text or a picture.

We'd love to hear from you! Please share your name and email to post and read comments.

You'll also get the latest articles directly to your inbox.

This site is protected by reCAPTCHA and the Google Privacy Policy and Terms of Service apply.
Todd Gersten, M.D. is a hematologist-oncologist at the Florida Cancer Specialists & Research Institute in Wellington, Florida. Review provided by VeriMed Healthcare Network. Learn more about him here.
Amy Isler, RN is a registered nurse with over six years of experience as a credentialed school nurse. Learn more about her here.

Related Articles

No one knows what it’s like to have cancer unless they’ve actually been through it. Lou Lanza is ...

5 Suggestions To Ease Your Cancer Journey From a Lymphoma Advocate

No one knows what it’s like to have cancer unless they’ve actually been through it. Lou Lanza is ...
If you daydream about dessert or yearn for something sweet after every meal, you’re not alone. Lo...

4 Things To Know About Lymphoma and Sugar Cravings

If you daydream about dessert or yearn for something sweet after every meal, you’re not alone. Lo...
Flow cytometry testing is one way your lymphoma care team may diagnose and monitor your condition...

How Flow Cytometry Is Used To Diagnose and Monitor Lymphoma

Flow cytometry testing is one way your lymphoma care team may diagnose and monitor your condition...
Scientists have linked many chemicals to an increased risk of developing lymphoma. Although these...

6 Chemicals That Raise Lymphoma Risk: Paint Thinners, Pesticides, and More

Scientists have linked many chemicals to an increased risk of developing lymphoma. Although these...
This is a short guided meditation by Dr. Christiane Wolf on self-kindness, which gives you more s...

Self-Kindness When Struggling: 6-Minute Guided Meditation

This is a short guided meditation by Dr. Christiane Wolf on self-kindness, which gives you more s...
You may choose to make certain lifestyle changes when you receive a lymphoma diagnosis to help yo...

4 Things To Know About Alcohol and Lymphoma

You may choose to make certain lifestyle changes when you receive a lymphoma diagnosis to help yo...

Recent Articles

Diffuse large B-cell lymphoma (DLBCL) is staged based on which lymph nodes and organs are involve...

Early vs. Advanced DLBCL: How Are They Treated Differently?

Diffuse large B-cell lymphoma (DLBCL) is staged based on which lymph nodes and organs are involve...
There are many risk factors, both inherited and environmental, believed to increase one’s risk of...

Is Diffuse Large B-Cell Lymphoma Inherited? Genetics and 8 Other Risk Factors

There are many risk factors, both inherited and environmental, believed to increase one’s risk of...
When treatment for diffuse large B-cell lymphoma (DLBCL) successfully kills all of your detectabl...

Remission and Complete Response in DLBCL: How Long It Lasts and More

When treatment for diffuse large B-cell lymphoma (DLBCL) successfully kills all of your detectabl...
The majority of people with diffuse large B-cell lymphoma (DLBCL) will live with their condition ...

DLBCL Prognosis: Fear, Hope, and Understanding Survival Rates

The majority of people with diffuse large B-cell lymphoma (DLBCL) will live with their condition ...
After successful treatment for diffuse large B-cell lymphoma (DLBCL), you’ll enter complete remis...

DLBCL Relapse: 4 Symptoms To Watch For

After successful treatment for diffuse large B-cell lymphoma (DLBCL), you’ll enter complete remis...
Roughly 50 percent to 60 percent of people relapse within the first two years of achieving remiss...

DLBCL Relapse Chances and Treatment Options

Roughly 50 percent to 60 percent of people relapse within the first two years of achieving remiss...
MyLymphomaTeam My lymphoma Team

Thank you for subscribing!

Become a member to get even more:

sign up for free

close