Biofreeze: Biofreeze is a roll-on pain reliever for sore muscles; muscle sprains; back, shoulder and neck pain; arthritis and chondromalacia; and painful ankle, knee, hip and elbow joints. Sombra Cooling Gel: Sombra Cooling Gel provides temporary pain relief for simple backaches, arthritis, strains, bruises and sprains. It is alcohol-free, non-greasy and does not stain.