Cov duab qhia deb infrared muaj peev xwm muaj peev xwm ntawm kev nkag mus, refaction, hluav taws xob thiab xav txog. Tib neeg lub cev tuaj yeem nqus hluav taws vim nws lub peev xwm tob tob tob. Thaum fir nkag mus los ntawm daim tawv nqaij mus rau cov ntaub so ntswg subcutaneous, nws hloov los ntawm lub teeb hluav taws xob rau hauv lub zog tshav ntuj sov.