CRP (C-reactive protein) is an acute-phase reactant that rises during systemic inflammation. In allergies, CRP can be moderately elevated, especially in allergic asthma or severe allergic reactions. However, CRP is not a specific marker for allergies—it responds to many inflammatory triggers such as infections, tissue damage, or chronic diseases. Studies indicate that elevated CRP in allergic individuals is often linked to comorbid inflammation (e.g., asthma) rather than the allergy itself. A normal CRP level does not rule out allergy. Consumer CRP tests are available, but interpretation requires clinical context. Evidence is based on observational studies; a causal role is not clearly established. Caution: an elevated CRP alone does not justify allergy diagnosis or treatment.
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