- Parents Home
- Allergy Center
- Asthma Center
- Cancer Center
- Cerebral Palsy Center
- Diabetes Center
- A to Z
- Emotions & Behavior
- First Aid & Safety
- Food Allergy Center
- General Health
- Growth & Development
- Flu Center
- Heart Health
- Helping With Homework
- Diseases & Conditions
- Nutrition & Fitness Center
- Play & Learn Center
- School & Family Life
- Pregnancy & Newborn Center
- Sports Medicine Center
- Summer Safety
- Doctors & Hospitals
- Preventing Premature Birth
- Para Padres
- Kids Home
- Asthma Center for Kids
- Cancer Center for Kids
- Movies & More
- Diabetes Center for Kids
- Getting Help
- Puberty & Growing Up
- Health Problems of Grown-Ups
- Health Problems
- Homework Center
- How the Body Works
- Illnesses & Injuries
- Nutrition & Fitness Center for Kids
- Recipes & Cooking for Kids
- Staying Healthy
- Stay Safe Center
- Relax & Unwind Center
- Q&A for Kids
- The Heart
- Videos for Kids
- Staying Safe
- Kids' Medical Dictionary
- Para Niños
- Teens Home
- Asthma Center for Teens
- Be Your Best Self
- Cancer Center for Teens
- Diabetes Center for Teens
- Diseases & Conditions (for Teens)
- Drugs & Alcohol
- Expert Answers (Q&A)
- Flu Center for Teens
- Homework Help for Teens
- Infections (for Teens)
- Managing Your Medical Care
- Managing Your Weight
- Nutrition & Fitness Center for Teens
- Recipes for Teens
- Safety & First Aid
- School & Work
- Sexual Health
- Sports Center
- Stress & Coping Center
- Videos for Teens
- Para Adolescentes
What Is Thrombocytopenia?
Thrombocytopenia (throm-buh-sye-tuh-PEE-nee-uh) is when there aren't as many normal platelets in the blood as there should be. Platelets are tiny colorless cells in the blood that help the blood clot. Like all blood cells, platelets are made in the bone marrow (the spongy inner part of bones).
What Are the Signs & Symptoms of Thrombocytopenia?
A child with a platelet count that is only a little low may not have any symptoms. But if the count drops low enough, a child might have one or more of these problems:
- easy bruising
- bleeding gums
- bleeding from minor wounds or nosebleeds that's hard to stop
- small red or purple spots on the skin called petechiae (peh-TEE-kee-eye)
- purple spots that look like bruises called purpura (PURR-pyur-ah)
- blood in vomit, urine (pee), or stool (poop)
The most serious type of bleeding that can happen is bleeding in the brain. Bleeding in or around the brain can't be seen, but it can cause headaches or changes in thinking or behavior.
What Causes Thrombocytopenia?
Many things can cause thrombocytopenia. Some are very serious and need medical treatment. Others are not serious and may clear up on their own with time.
Causes of thrombocytopenia include:
- chemotherapy, which can kill or injure the cells that make platelets
- other medicines, which may suppress production of platelets
- immune thrombocytopenic purpura (ITP), where the immune system destroys platelets
- viral infections, such as mononucleosis (mono)
- leukemia, a kind of blood cancer
- bone marrow failure (sometimes called aplastic anemia)
- autoimmune diseases like lupus
- some inherited (genetic) problems
- other health conditions that destroy platelets or use them up too quickly
How Is Thrombocytopenia Diagnosed?
A doctor may suspect thrombocytopenia if a child has:
- easy bleeding
- red spots on the skin
The doctor will examine the child, ask questions, and order a blood test called a complete blood count (CBC).
If thrombocytopenia is diagnosed, more tests are done to figure out what's causing it. The tests needed depend on the child's , the exam results, and what the blood test shows.
Sometimes, doctors order a biopsy to get a sample of bone marrow for testing and to check under a microscope.
How Is Thrombocytopenia Treated?
The treatment for thrombocytopenia depends on:
- what's causing it
- how low the platelet count is
- whether or not there is bleeding
Sometimes no treatment is needed and the thrombocytopenia clears up on its own. But some types need medical treatment to raise the platelet count to a safer level and to treat the underlying cause.
Thrombocytopenia is usually treated by a , a doctor who specializes in diagnosing and treating blood disorders.
What Else Should I Know?
Most of the time, thrombocytopenia either goes away on its own or can be treated successfully. But children with a low platelet count should take care to avoid injuries, especially to the head, because of the risk of bleeding.
If your child has thrombocytopenia, the doctor will tell you which activities are safe and which to avoid. Your child also shouldn't take medicines that contain ibuprofen (such as Motrin or Advil) or aspirin because these can increase the risk of bleeding.
- Henoch-Schönlein Purpura (HSP)
- Side Effects of Chemotherapy and Radiation
- Blood Test: Complete Blood Count
- Immune Thrombocytopenia
- Hemolytic Anemia
- Stem Cell Transplants
- Aspiration and Biopsy: Bone Marrow
- Aplastic Anemia
- Immune System
Note: All information is for educational purposes only. For specific medical advice, diagnoses, and treatment, consult your doctor.
© 1995- KidsHealth® All rights reserved.
Images provided by The Nemours Foundation, iStock, Getty Images, Veer, Shutterstock, and Clipart.com.