Cov hlau banding yog ib daim hlau tiaj tiaj uas ruaj khov heev siv los khi cov khoom hnyav rau kev khaws cia lossis xa khoom. Txawm nyob hauv cov tsev rau khoom, cov chaw tsim khoom, lossis txawm tias cov khw me me, cov hlau banding ua rau cov khoom thauj ruaj khov thiab ruaj khov thaum mus ncig. Nws txoj haujlwm tseem ceeb yog khi cov khoom loj, xws li ntoo, cov kav dej, lossis cov khoom siv kho tshuab, ua ib lub pob me me thiab zoo nkauj. Nrog lub zog tawg siab thiab lub neej ntev, cov hlau banding zoo heev rau cov haujlwm uas cov yas lossis cov ntaub tsis ua haujlwm. Ntau tus neeg ua haujlwm xaiv cov hlau banding rau cov haujlwm uas xav tau kev saib xyuas ntau dua, xws li xa khoom mus txawv teb chaws lossis thauj cov khoom ntse. Kev paub txog thaum twg thiab vim li cas siv cov hlau banding tuaj yeem pab txuag lub sijhawm, txo cov nqi thiab tiv thaiv cov khoom kom tsis txhob puas tsuaj. Ntu hauv qab no yuav tham txog yuav ua li cas xaiv thiab siv nws kom zoo.