Kev tawm los ntawm lub qhov muag ntawm tus menyuam tshiab: thaum koj xav tau lub tswb nrov?
Yuav ua li cas "xauv" cov kua muag pleev tawm? Thaum twg yog xav tau kev kho mob? Thaum mus ntsib kws kho mob Kev xau tawm ntawm lub qhov muag yog qhov teeb meem ib txwm muaj rau cov menyuam tshiab, uas feem ntau cuam tshuam nrog kev thaiv ntawm lacrimal duct. Cais tshwm sim nrog