Results: The 3TNSS score was significantly decreased and the symptoms were improved in SAR patients with MG. The salivary flow of SAR patients was significantly lower than that in healthy subjects, whereas the salivary flow of SAR with MG was significantly increased. The multi-item saliva test of SAR patients showed a significant increase in cariogenic bacteria, acid buffering capacity, and ammonia production, but a significant decrease in pH, occult blood, leukocyte count, and protein concentration, compared with healthy subjects. In SAR patients, only occult blood decreased after wearing a MG; the other test items did not change.