Chemo fatigue can last throughout treatment and linger for months to over a year after, though many people feel significantly better within 6 to 12 months post-treatment, with some experiencing it for years, especially after intensive therapy. It's a distinct exhaustion not relieved by rest, varying greatly in severity, and often improves gradually as your body recovers and blood counts normalize, but can be managed with rest, light exercise, and prioritizing activities, notes the Cancer Council and other health resources.
Fatigue caused by chemotherapy may last for months or years after a treatment, however, many people find that their energy levels return to normal 6–12 months after treatment ends. While fatigue is a common side effect of chemotherapy, it can also be a symptom of depression.
You might feel the most tired when your blood cells are at their lowest (nadir). This is usually 7 to 14 days after treatment. When the chemotherapy ends, the blood cell levels gradually go back to normal over a few weeks.
“If you're on a strong chemo regimen, usually the day after is when you'll experience the worst symptoms,” says Iheme. “By worst, I mean you'll experience the most fatigue, weakness and nausea. Normally, three or four days after chemo, your symptoms will get better.”
You might get some relief from cancer fatigue if you:
Staying hydrated after chemotherapy is important for the prevention of side effects. Drinking enough water and fluids will help to flush out some of the toxins that are released during chemotherapy or radiation therapy as well as help prevent future health problems.
Battling chronic fatigue through focused nutrition
Signs of improvement can show up early in chemotherapy. These signs include tumor shrinkage on scans, lowered tumor marker levels in blood tests, and better blood counts. Healthline says these signs help doctors see if treatment is working.
Chemotherapy can cause diarrhea, so it helps to have something on hand, like Imodium, to alleviate this side effect. Ginger tea or candy. Chemotherapy can affect your sense of taste, making some people nauseous. Known for its tummy-soothing properties, ginger tea or candy can help ease nausea symptoms.
Many people feel fine for the first few hours following chemotherapy. Usually, some reaction occurs about four to six hours later. However, some people don't react until 12 or even 24 to 48 hours after treatment. Some people experience almost all of the side effects described below, while others experience almost none.
Regular exercise increases your sense of well-being after cancer treatment and can make your recovery faster. Cancer survivors who exercise may experience: Increased strength and endurance. Fewer symptoms of depression.
After your last dose of chemotherapy, your white blood cell count will go down. It should start to go back to normal about a month after your last treatment. Your red blood cell count may also go down, but it should go back to normal around the same time.
Fatigue often tends to get worse with each progressive round of chemo. This means that if you feel weak after your first chemo session, you'll likely feel weaker after the second. Still, there isn't a set timeline for when chemotherapy side effects start.
One side effect of cancer and cancer treatment is sleeping too much. This is called hypersomnia. Hypersomnia that's linked to chemotherapy treatment often improves after treatment ends.
Water is best. Other options include apple and grape juice, fruit nectar, broth, clear soup, sports drinks, popsicles, sherbet, gelatin, herbal teas such as ginger and mint, and weak black teas. Take anti-nausea medications as prescribed by medical team.
The cancer is actively growing despite the treatment. Blood tests that track proteins made by cancer cells show a consistent rise. The overall cancer activity in the body is increasing. Symptoms like pain, fatigue, or breathing issues are getting worse instead of better.
Complete response - all of the cancer or tumor disappears; there is no evidence of disease. A tumor marker (if applicable) may fall within the normal range. Partial response - the cancer has shrunk by a percentage but disease remains. A tumor marker (if applicable) may have fallen but evidence of disease remains.
Your immune system will be weaker after chemotherapy, increasing your risk of infection. Wash your hands often with soap and water, and avoid touching your face. Regularly clean frequently touched surfaces at home, like doorknobs and countertops, and stay away from sick people and crowded places when possible.
For a snack that will fill you up until the next meal, try to include protein along with fiber-rich fruits, vegetables, or whole grains. Low-sugar, 100% whole-grain cereals and fruit. You can pick up low-fat or non-fat milk or yogurt at a store or coffee shop to go with it.
“Vitamins and minerals help our bodies' enzymatic processes, which play a big role in boosting immune function and reducing inflammation,” Rajagopal says. When possible, select foods fortified with vitamin D. These may include milk, orange juice, yogurt and some cereals.
You will often receive chemo in sessions where you have treatment for several weeks, followed by a few weeks off before resuming. Your tumor may start to shrink after one round, but it can also take months. Your oncologist will have a personal discussion with you about how long they think results might take.
Radiation therapy and chemo are often combined to treat cancer. While both treatments are effective, chemo generally produces more serious side effects than radiation therapy. How radiation therapy is used to treat cancer. American Cancer Society.
Why You Might Want to Avoid This: Some patients may get mouth sores from chemotherapy. Acidic foods like oranges and grapefruits can make them worse.
After a chemotherapy infusion, the body must recover from the harsh chemicals. Ways to flush chemo out of body include staying hydrated, eating nutrient-rich foods, and supporting liver and kidney function.
Choose desserts that aren't as sweet, such as yogurt, custard, pumpkin pie, fruit, baked fruit, fruit with cottage cheese, fruit crumble, plain doughnuts, or graham crackers.