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Treating asthma in children under 5

Lab tests

Other tests may include the following:

  • Blood test. This can measure the levels of certain white blood cells that may be higher in response to infections.
  • Chest X-ray. This may reveal changes in the lungs when asthma is moderate to severe. It also may be used to find out if other treatable conditions are the cause of your child's symptoms.
  • Allergy test. A skin or a blood test may indicate if your child has an allergy.