AR patients were treated by sublingual administration of D. farinae drops (Changdi, produced by Zhejiang Wowu Biotechnology Co., Ltd., China). SLIT with D. farinae drops can be divided into two stages: the increasing stage and the dose maintenance stage. Children under 14 years of age used No. 1–4, among which the No. 1–3 preparation was used in the incremental phase and No. 4 preparation was used in the maintenance phase. Table 1 shows the dosage schedule of D. farinae drops for children. To administer the medication, it should be swallowed 1–3 minutes after it is under the tongue. If the number of drops is too large, it can be taken several times. Patients could eat and drink normally 5 minutes after taking the medicine. Concurrent with desensitization treatment, symptomatic drugs must be used together as needed to control symptoms. The drug regimen should follow Global Initiative for Asthma (GINA) and allergic rhinitis and its impact on asthma (ARIA), and the patient’s condition should be evaluated regularly. When the patient’s condition improves, symptomatic drugs can be used for degrading treatment.