Please note. This is not meant to be a comprehensive list. These are studies we have found helpful in referencing.
Core association studies (Tourette’s / tics + allergies)
- https://pubmed.ncbi.nlm.nih.gov/10462998/
(Association of allergy with Tourette’s syndrome) - https://pmc.ncbi.nlm.nih.gov/articles/PMC7720316/
(Population-based correlation of Tourette syndrome with allergic diseases) - https://www.sciencedirect.com/science/article/abs/pii/S0149763421005522
(Tic disorders associated with asthma, allergic rhinitis, conjunctivitis) - https://www.researchgate.net/publication/49739269_Correlation_of_Tourette_Syndrome_and_Allergic_Disease_Nationwide_Population-Based_Case-Control_Study
(Nationwide case-control: allergic diseases increase Tourette risk)
Meta-analysis / systematic reviews
- https://pmc.ncbi.nlm.nih.gov/articles/PMC10067604/
(Meta-analysis: allergic rhinitis, eczema, food allergy linked to tic disorders) - https://www.frontiersin.org/journals/pediatrics/articles/10.3389/fped.2023.1064001/full
(Systematic review + meta-analysis of tic disorders and allergic conditions) - https://pmc.ncbi.nlm.nih.gov/articles/PMC11218626/
(Review: allergic diseases as risk factors for tic disorders; histamine pathways implicated) - https://www.frontiersin.org/journals/allergy/articles/10.3389/falgy.2026.1769483/full
(Review: allergy management may influence tic severity)
Clinical / case-control studies (children with allergies + tics)
- https://pmc.ncbi.nlm.nih.gov/articles/PMC10768233/
(Case-control: allergic rhinitis associated with tic disorders in children) - https://link.springer.com/article/10.1186/s12887-023-04482-4
(Allergic rhinitis patients show higher tic frequency/severity) - https://link.springer.com/article/10.1007/s10792-019-01174-w
(Allergic conjunctivitis associated with provisional tic disorder; eye-blinking overlap)
Mechanistic / immune + histamine links
- https://www.ovid.com/journals/jimd/pdf/10.1136/jim-2021-001788~allergic-diseases-influence-symptom-severity-and-t
(Allergy-related immune dysfunction worsens tics and behaviors) - https://news.yale.edu/2017/06/05/tourette-tics-vanish-mice-treated-histamine
(Histamine modulates Tourette-like tic behavior in animal model)
Studies showing allergy treatment associated with tic improvement or symptom reduction
- https://www.frontiersin.org/articles/10.3389/falgy.2026.1769483/full
(Review: suggests allergy management may reduce tic severity; discusses antihistamines and immune modulation) - https://pmc.ncbi.nlm.nih.gov/articles/PMC11218626/
(Review: allergic diseases influence tic severity; notes symptom improvement when allergic inflammation is controlled) - https://www.ovid.com/journals/jimd/pdf/10.1136/jim-2021-001788~allergic-diseases-influence-symptom-severity-and-t
(Clinical study: allergic disease severity correlates with tic severity; improvement in allergy status associated with symptom reduction)
Mechanistic + indirect treatment relevance (important but not direct trials)
- https://pmc.ncbi.nlm.nih.gov/articles/PMC7749329/
(Histamine H3 receptor modulation alters repetitive/compulsive behaviors → potential treatment pathway) - https://www.pnas.org/doi/10.1073/pnas.0809479105
(Mast cell stabilization impacts anxiety-like behaviors → supports MCAS treatment relevance) - https://news.yale.edu/2017/06/05/tourette-tics-vanish-mice-treated-histamine
(Animal model: histamine restoration reduces tic-like behaviors)
Gabriella True
