Management

Life After Cancer: Sleep Problems You May Have

Choose a preferred language

Many people have sleep problems after cancer. You may have trouble falling asleep. Or feel like you need to sleep all day long. You may also have trouble staying asleep or have nightmares. Sleep problems can last for a long time after cancer and cancer treatment. They can affect your daily life, work, and relationships.


Types of sleep problems after cancer

Insomnia means you have trouble going to sleep and staying asleep. It can be short-term (days to weeks) or chronic (last over 3 months). If you have insomnia, you may have:

  • Trouble getting to sleep.

  • Trouble staying asleep.

  • Trouble getting back to sleep if you wake in the night.

  • Early waking and not being able to go back to sleep.

  • Tiredness all the time, despite spending enough time in bed.

Hypersomnia means you sleep too much. If you have hypersomnia, you may:

  • Sleep for 10 or more hours a day.

  • Be unable to stay awake during the day despite lots of sleep.

  • Find that daytime sleepiness isn’t helped with a nap.

  • Periods of deep sleep are longer than normal.

Vivid, unpleasant dreams are known as nightmares. If you have nightmares, you may have symptoms such as:

  • Waking in the middle of the night.

  • Fear of sleeping.

  • Daytime sleepiness.

  • Sleep that doesn’t feel restful.


What causes sleep problems after cancer?

Many things can affect sleep after cancer, such as:

  • Medicines you’re taking.

  • Symptoms linked to cancer, such as nausea, night sweats, or pain.

  • Getting less physical activity.

  • Other health problems, like heart disease, urinary problems, restless leg syndrome, or sleep apnea.

  • Hot flashes caused by hormone changes.

  • Cancer-related post-traumatic stress.

  • Worry, depression, or anxiety.

  • Your sleep hygiene (sleep routine).

  • Taking longer naps or too many naps during the day.

  • Drinks with alcohol or caffeine.

Talk to your doctor if you have sleep problems. Your doctor can help you find out the cause of your problems. They can also talk with you about treatment options.

Featured in

Online Medical Reviewer: Jessica Gotwals RN BSN MPH

Online Medical Reviewer: Susan K. Dempsey-Walls RN

Date Last Reviewed: 06/01/2025

© 2026 The StayWell Company, LLC. All rights reserved. This information is not intended as a substitute for professional medical care. Always follow your healthcare provider's instructions.
cancer ribbon

Compassionate Cancer Care

Learn about our cancer services and meet the specialists who support you at every step at the HPH Cancer Centers.

Meet Our Team
Related Articles
Read article
Oncology
Life After Cancer: Mental (Cognitive) Changes

Cognitive problems are common after cancer treatment. It’s often known as “chemo brain.” Some people describe it as feeling like “brain fog.”

Read article
Oncology
Cancer and Spirituality

People with cancer often tap into their spiritual side when battling the illness. This might include prayer, attending religious services, reading passages from a holy book, or simply expressing gratitude and love.

Read article
Oncology
Nutrition and Cancer: Clear Liquids and Full Liquids

Helpful tips on clear liquids and full liquids that may help you deal with side effects during cancer treatment.

Read article
Oncology
Life After Cancer: Focusing on Self-Care

Cancer and its treatment are hard on the body and spirit. After your recovery, try to look for joy and use your energy in positive ways.