How Is Hay Fever (Allergic Rhinitis) Diagnosed? Tests, Criteria & Process
Hay Fever (Allergic Rhinitis) diagnosis relies on Full blood count (FBC), Comprehensive metabolic panel (electrolytes, creatinine, LFTs), Urinalysis. Learn the full diagnostic pathway, clinical criteria, differential workup, and what to expect at your evaluation.
Updated March 27, 2026
Hay Fever (Allergic Rhinitis) is diagnosed using Full blood count (FBC), Comprehensive metabolic panel (electrolytes, creatinine, LFTs), Urinalysis and targeted clinical evaluation. Hay fever (allergic rhinitis) is an allergic reaction to airborne allergens like pollen, dust mites, or pet dander. It is one of the most common allergic conditions, affecting up to 30% of the population.
Clinical Context
The diagnostic process for Hay Fever (Allergic Rhinitis) begins with Thorough history and physical examination followed by basic blood and urine tests; targeted specialist investigation as needed. Key investigations include Full blood count (FBC), Comprehensive metabolic panel (electrolytes, creatinine, LFTs), Urinalysis, Chest X-ray. The gold standard is: Directed investigation based on clinical history and physical examination findings. Clinical guidelines from NICE / BMJ Best Practice / WHO define the diagnostic criteria and recommended investigation pathway.
Clinical Pathway
Hay Fever (Allergic Rhinitis) — Full Condition GuideCondition HubHay Fever (Allergic Rhinitis) — Differential DiagnosisDifferentialHay Fever (Allergic Rhinitis) — Treatment PathwaysTreatmentHay Fever (Allergic Rhinitis) — Prognosis & OutlookPrognosisFrequently Asked Questions
How Is Hay Fever (Allergic Rhinitis) Diagnosed? Tests, Criteria & Process?+
Hay Fever (Allergic Rhinitis) is diagnosed using Full blood count (FBC), Comprehensive metabolic panel (electrolytes, creatinine, LFTs), Urinalysis and targeted clinical evaluation. Hay fever (allergic rhinitis) is an allergic reaction to airborne allergens like pollen, dust mites, or pet dander. It is one of the most common allergic conditions, affecting up to 30% of the population.
How do doctors test for hay fever (allergic rhinitis)?+
The main tests used to diagnose Hay Fever (Allergic Rhinitis) include Full blood count (FBC), Comprehensive metabolic panel (electrolytes, creatinine, LFTs), Urinalysis. Your doctor will select investigations based on your symptoms, clinical findings, and risk factors.
How long does it take to diagnose Hay Fever (Allergic Rhinitis)?+
The time to diagnosis varies. Some cases are identified within hours using clinical presentation and blood tests; others require weeks, repeated investigations, or specialist referral.
Can Hay Fever (Allergic Rhinitis) be missed on initial testing?+
Yes — Hay Fever (Allergic Rhinitis) can be missed if initial tests are negative or if the presentation is atypical. If clinical suspicion remains high, repeat testing or specialist referral is appropriate.
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