Allergic rhinitis therapeutic agent

The present invention provides a non-invasive, almost no side effects and pain in patients with physically, can safely and easily therapeutic agent of allergic rhinitis. The present invention provides a 5-aminolevulinic acid - therapeutic photodynamic therapy (ALA-PDT) with allergic rhinitis, which comprises 5-aminolevulinic acid (ALA) or a derivative thereof or a salt thereof as an active ingredient is used in the irradiation of 400nm ~ 700nm wavelength light ALA-PDT, the present invention particularly provides a therapeutic agent capable of topical application of the solution type, solution type ointment, or a water-soluble jellies dissolution type and the like allergic rhinitis. The therapeutic agent 5-aminolevulinic acid without prior ALA-PDT - Photodynamic Diagnosis (ALA-PDD), which is ALA-PDD excitation wavelength of 380nm ~ 420nm irradiation light detecting emission wavelength of 610nm ~ 650nm protoporphyrin IX (PpIX) accumulated in parts of the light.