Symptoms and Side Effects

Thrombocytopenia (bruising and bleeding)

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Thrombocytopenia (Low Platelets)

Cancer treatment can be tough on your body in more ways than one. One side effect you might experience is thrombocytopenia, which means your platelet count is lower than normal. Platelets are the cells that help your blood clot, so when they drop, you may notice more bruising, bleeding, or even tiny red spots on your skin.

These changes can feel alarming or frustrating, but there are things you can do to protect yourself and feel more in control.

Understanding Why It Happens

Some chemotherapy medicines affect your bone marrow, where platelets are made. When platelet production slows down, it becomes easier to bruise or bleed, even without an obvious cause. Symptoms may include:

  • Bleeding from your nose or gums
  • Tiny red or purple dots on your skin (called petechiae)
  • Unusual or prolonged bruising

Your care team will regularly check your platelet levels with a simple blood test as part of your complete blood count (CBC).

What You Can Do at Home to Stay Safe

If you have thrombocytopenia, you can take small, simple steps to lower your risk of bleeding and help you care for your body with confidence.

Tips for Nosebleeds

Nosebleeds can be unsettling, but they’re a common sign of low platelets. If one happens:

  • Sit upright and lean slightly forward
  • Pinch your nostrils gently but firmly for 10 minutes
  • Apply a cold compress to the bridge of your nose
  • If the bleeding doesn’t stop, call your care team or go to the ER
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Things to Avoid (for now)

When your platelets are low, it’s best to skip:

  • Flossing, toothpicks, or dental irrigation
  • Sports or physical activities that could cause injury
  • Tampons, enemas, suppositories, or rectal thermometers
  • Tight collars, waistbands, or wristbands

These precautions may feel limiting but they are temporary. As your body recovers, your platelet count will likely improve, and these restrictions can be eased.

If Your Platelet Count is too Low

Your doctor will watch your levels closely. If they drop too much, your care team may:

  • Delay your next round of treatment
  • Prescribe a medication to help
  • Recommend a platelet transfusion

All of these are normal parts of adjusting your care to keep you safe.

When to Call Your Care Team

It’s always better to check in than to worry. Reach out to your care team immediately or go to the ER if you notice any of the following:

  • A sudden or severe headache
  • Blurred vision
  • Confusion or difficulty thinking clearly
  • Dizziness, weakness, or feeling faint
  • Bleeding that doesn’t stop
  • Vomit that’s bloody or looks like coffee grounds
  • Black or bloody stool
  • Pink or red urine
Call During Office Hours If You Notice:
  • New bruises or red spots you can’t explain
  • Muscle or joint pain
  • Vaginal bleeding not caused by your period
  • Heavier or longer menstrual flow
  • A warm or painful feeling in your arm or leg

If you’re feeling overwhelmed, uncomfortable, or unsure, let your care team know. Their job is to support you every step of the way.