Rubbing Vicks VapoRub on feet at night can relieve muscle tension, promote relaxation, and improve sleep quality. The menthol and eucalyptus oil in Vicks work to cool and soothe the skin, easing minor aches and pains. Additionally, it can boost the immune system by combating bacteria and viruses, increase white blood cell production, and enhance respiratory health by loosening mucus from lungs and airways. This simple practice promotes relaxation during pregnancy and reduces morning sickness symptoms.