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.
Suitcase Icon

Learn More About Health Services at PIH Health

Expert care for every stage of life. Explore the comprehensive services offered at PIH Health.

Explore Services
Newspaper Icon

Get Health Tips & Updates

Sign up for helpful health information, wellness tips and news from PIH Health, delivered straight to your inbox.

Subscribe
Related Articles
Read article
Oncology
Brain Tumors: Emotional Issues

Coping with a brain tumor is one of the most difficult things you might face. These tips can help you during this time.

Read article
Oncology
Managing Lymphedema After Cancer

Lymphedema is a problem that may occur after cancer surgery, or after radiation to the lymph nodes. It has no cure, but you can take steps to reduce or relieve symptoms.

Read article
Oncology
Chemotherapy and Liver Toxicity

Although chemo is good at killing cancer cells, it can also harm healthy cells and organs. That includes your liver.

Read article
Oncology
Pain and Chemotherapy

The goal of pain control is to prevent pain that can be prevented, and to treat pain that cannot be prevented. It is possible that you will not have pain from chemotherapy treatments. But if you do, you can take steps to relieve it.

Stethoscope Icon

Personalized Care Starts with the Right Provider

Search by specialty, location, and more.

Find A Doctor
Appointments Icon

Make an Appointment

Your health can't always wait. Schedule an appointment with a PIH Health provider.

Schedule an Appointment
Cross Icon

Find a PIH Health Urgent Care Location

Need care today?. Find the nearest PIH Health Urgent Care location.

Find Urgent Care