Objective To compare dynamic change of nasal resistance before and after ATD SCIT. Method 43 cases of adult patients with allergic rhinitis, tracking ATD SCIT, recording symptom and sign scores、nasal resistance before and15 weeks after treatment, 1 year after treatment. Compare symptom and sign scores, nasal resistance all periods. Result symptom and sign scores(single symptom scores, total symptom scores)、nasal resistance before dust mites SCIT and 15 weeks after treatment, 1 year after treatment was stati...