Imitha ye-Infrared ekude inamandla okungena, ukuphindaphinda, ukusasazeka kwemitha kunye nokubonakalisa. Umzimba womntu unokufunxa i-FIR ngenxa yobuchule bawo bokungena obunzulu. Xa i-FIR ingena ngesikhumba kwizicubu ezingaphantsi kwe-subcutaneous, iguqula ukusuka kumandla okukhanya ukuya kumandla obushushu.