Verimuhk ehk hematoom on trauma tagajärjel tekkinud verevalum, mis võib kujuneda juba väikese vigastuse korral, kusjuures kalduvus nende tekkeks on indiviiditi erinev.
Pressure may be equalized by an increase in external pressure as blood becomes trapped in the tissues (hematoma) or by a decrease in the intravascular pressure (the pressure within the blood vessel) caused by constriction of a supply vessel.