Deep Heat Rub Fast relief from muscular aches and pains. Deep heat rub is a non-greasy pain relieving cream to be applied to the skin. The penetrating warmth of deep heat helps stimulate circulation, relax stiffness and reoxygenate tense, painful tissues. Its counterirritant action makes it effective in the treatment of muscular pains and stiffness including rheumatic pain, backache, fibrostis, lumbago and sciatica. It can also be used for the treatment of chilblains and sprains and is suitable for minor sports injuries.