ADHD & allergies

Allergies and ADHD frequently co-exist, with inflammation playing a key role in their connection. Other factors like diet, sleep, and genetics may also contribute.

Person underneath a blanket blowing their nose with a tissue.
Dr Daniel
Medically reviewed by Danielle Mulligan ADHD Clinician

Reading time: 1 min

Uploaded on: February 4, 2026

ADHD and allergies: Exploring the connection

Research suggests that if you have ADHD, you may be more likely to have allergies. Inflammation seems to be a common link, but diet and sleep may also play a role.

  • Histamine affects both ADHD and allergies, impacting sleep, focus, and swelling.
  • Both conditions can cause sleep issues, which could make symptoms worse.
  • Poor nutrition can increase inflammation, affecting ADHD and allergies.
  • Managing both conditions requires a combined approach, including medication and lifestyle changes.

Why might ADHD and allergies be linked?

People with ADHD have a 30-50% higher risk of developing allergies.1

One key factor is inflammation, common in ADHD and allergic responses. Other factors like poor diet, sleep disturbances, and poor gut health may also play a role.

The link between ADHD and allergies

Overlapping symptoms and triggers

Managing ADHD and allergies

  1. Chua, R. X., et al. (2021). Understanding the Link Between Allergy and Neurodevelopmental Disorders: A Current Review of Factors and Mechanisms. Frontiers in Neurology, 11, 603571.
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Reading time: 1 min

Uploaded on: February 4, 2026

Dr Daniel
Medically reviewed by Danielle Mulligan ADHD Clinician Registered with GMC (15A0206E) February 4, 2026 Meet Danielle Mulligan
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Written by Focused Content Team
Last updated on January 27, 2026
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