18. of my disease--rather, "of God" (Job 23:6).
      garment changed--from a robe of honor to one of mourning, literally (Job 2:8; Joh 3:6) and metaphorically [UMBREIT]. Or rather, as SCHUTTENS, following up Job 30:17, My outer garment is changed into affliction; that is, affliction has become my outer garment; it also bindeth me fast round (my throat) as the collar of the inner coat; that is, it is both my inner and outer garment. Observe the distinction between the inner and outer garments. The latter refers to his afflictions from without (Job 30:1-13); the former his personal afflictions (Job 30:14-23). UMBREIT makes "God" subject to "bindeth," as in Job 30:19.

JFB.