How Does Chemotherapy Work? 8 Clear Signs Your Treatment Is Working

Topic	Information
What shows chemotherapy is working?	Pictures of the inside of your body blood tests and physical exams
When do doctors usually check if treatment is working?	After 2 to 4 chemotherapy treatments (it depends on the type of cancer)
Do side effects mean chemotherapy is working?	No. Side effects do not mean the treatment is working.
Do all patients respond the way?	No. Each person responds differently to treatment.

8 Signs Chemotherapy Is Working

Every person is different. There are some signs that might mean chemotherapy is helping to control your cancer.

1. Your Symptoms Are Getting Better

One of the signs that treatment is working is that your symptoms are getting better.

You might notice:

• Less pain
• Less swelling
• It is easier to breathe
• It is easier to swallow
• You are coughing less
• You are bleeding less
• Your bowel or bladder is working better

If your symptoms are getting better it might mean the cancer is not growing fast or the tumour is not pressing on other parts of your body as much.

2. The Tumour Is Getting Smaller

For some types of cancer, chemotherapy can help shrink the tumour
You might notice:

• A lump is getting smaller
• There is swelling
• You are feeling better around the area where the tumour’s
• You can move more easily if the tumour was affecting your movement

Usually doctors use pictures of the inside of your body to see if the tumour is getting smaller, not just a physical exam.

3. Scans Show The Treatment Is Working

Pictures of the inside of your body are a way to see if chemotherapy is working.

Treatment may include:

• CT scan
• PET-CT scan
• Ultrasound

These scans can show:

• If the tumour is getting smaller
• If the cancer has stopped growing
• If there are cancer cells
• If there are no areas of cancer

4. Your Blood Tests Are Getting Better

Blood tests help doctors see how your body is responding to treatment.

Depending on the type of cancer you have your doctor might check:

• Your blood cell count
• How well your organs are working
• Markers for cancer (for some types of cancer)

If your blood tests are getting better it might mean the treatment is working.

5. Your Appetite Is Getting Better

Some cancers can make it hard to eat.

Eating well is important when you are getting chemotherapy.

6. Your Weight Is Staying The Same

Some people with cancer lose weight without trying.

When chemotherapy starts to work you might:

• Not lose weight
• Gain weight slowly
• Feel stronger
• Have energy

Your weight will be monitored during treatment.

7. You Have More Energy

Cancer can make you feel tired.

When treatment starts to work you might:

• Feel more energetic
• Be able to do things
• Sleep better
• Not feel as weak

But chemotherapy can also make you feel tired so your energy levels might go up and down.

8. Swollen Lymph Nodes Are Getting Smaller

Some cancers can make your lymph nodes swell.

When chemotherapy is working these swollen nodes might get smaller.

You might notice this in your:

• Neck
• Armpits
• Groin

How Long Does It Take To See If Chemotherapy Is Working?

Chemotherapy does not work away.

Most people have 2 to 4 treatments before their doctor checks to see if it is working. It depends on the type of cancer you have, how far it has spread, what your treatment goals are and how you respond to the medicine.

Do Side Effects Mean Chemotherapy Is Working?

No.

Some people think that if they have a lot of side effects it means the treatment is working better.. This is not true.
Some people have a lot of side effects. Some people have hardly any. Both can happen even if the chemotherapy is working.

When Should You Call Your Doctor?

When you are getting chemotherapy you should call your doctor if you:

• Have a fever that will not go away
• Are having trouble breathing
• Are Have diarrhoea that will not stop
• Have swelling that is getting worse
• Are in a lot of pain
• Are losing weight quickly
• Have symptoms that are getting worse

Why Choose MGM Cancer Institute?

At MGM Cancer Institute, every chemotherapy treatment is carefully monitored by experienced medical oncologists. Using regular clinical evaluations, blood tests, and advanced imaging, our team tracks your progress and adjusts your treatment plan when needed. Our focus is to provide personalized, evidence-based cancer care while supporting you through every stage of your treatment journey.

Book an appointment with our cancer specialists today for expert guidance and personalized chemotherapy care.

DOCTOR DETAILS:

Dr. M.A. Raja
Director and Senior Consultant
Medical Oncology