Eosinophils are part of your immune system. They help your body respond to things like allergies, asthma, and some infections. They’re usually measured as part of a full blood count (FBC).
When Levels are High
Called eosinophilia. It can mean:
• Allergies (like hay fever, asthma, eczema)
• Parasite infections
• Some immune system conditions
• A reaction to medications
• Rarely, blood disorders or certain cancers
When Levels are Low
Not usually a cause for concern. Can happen if:
• You’re taking corticosteroids (like prednisone)
• You’re under physical stress (e.g. surgery, trauma)
• You have a hormone imbalance (like Cushing’s syndrome)
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Understanding trends in the results
📈 High over time: May suggest allergies, asthma, or a chronic immune condition.
âš¡ Sudden spike: Could be a reaction to something new—like a medication or an infection.
📉 Low levels: Often seen with stress or steroid medication.
🔄 Changes over time: Might link to things like your menstrual cycle, infections, or environmental exposures.
💡 Why it Matters
Eosinophils don’t tell the whole story on their own—but they can give clues about how your immune system is behaving. Tracking changes over time can help identify patterns, especially if you have symptoms like fatigue, rashes, breathing issues, or digestive changes.
Here is a really deep dive written by the British Society of Immunology
💡 Why it Matters
Eosinophils don’t tell the whole story on their own—but they can give clues about how your immune system is behaving. Tracking changes over time can help identify patterns, especially if you have symptoms like fatigue, rashes, breathing issues, or digestive changes.
Here is a really deep dive written by the British Society of Immunology
