Arnica complex HM 21 (Impact injuries drops) is a specialized formula designed to provide relief for post-traumatic syndromes and other physical injuries, such as sprains, bruises, contusions, strains, haematomas, burns, haemorrhages, myalgia, bone and periosteum injuries, pain in bone, periosteum, joints, fibers and muscles, and more. It can also be used to relieve the pain of dislocations, sprain, injury from stitch or bite, and ecchymosis.