Jamieson, Fausset and Brown on Jeremiah 8:22

22. balm--balsam; to be applied to the wounds of my people. Brought into Judea first from Arabia Felix, by the queen of Sheba, in Solomon's time [Josephus, Antiquities, 8.2]. The opobalsamum of Pliny; or else [Bochart] the resin drawn from the terebinth. It abounded in Gilead, east of Jordan, where, in consequence, many "physicians" established themselves (Jr 46:11; 51:8; Ge 37:25; 43:11).

health ... recovered--The Hebrew is literally, "lengthening out ... gone up"; hence, the long bandage applied to bind up a wound. So the Arabic also [Gesenius].