Albert Barnes Commentary Job 30:27

"My heart is troubled, and resteth not; Days of affliction are come upon me." — Job 30:27 (ASV)

My bowels boiled - Or rather, My bowels boil - because he refers to his present circumstances, and not to the past. It is clear that by this phrase he means to describe deep affliction.

The bowels, in the Scriptures, are represented as the seat of the affections. By this is meant the upper bowels, or the region of the heart and the lungs. The reason is that deep emotions of the mind are felt there. The heart beats quickly; or it is heavy and pained; or it seems to melt within us in the exercise of pity or compassion. Compare the notes at Isaiah 16:11.

The idea here is that the seat of sorrow and of grief was affected by his calamities. Nor was the feeling slight. His emotions he compared to agitated, boiling water. It is possible that there is an allusion here to the inflammatory nature of his disease, producing internal heat and pain; but it is more probable that he refers to the mental anguish he endured.

The days of affliction prevented me - This literally means “have anticipated me,” because the word "prevent" was formerly used this way, and it is uniformly used this way in the Bible (see the notes at Job 3:12; Psalms 79:8; Psalms 88:13; Psalms 119:148; 1 Thessalonians 4:15). There is in the Hebrew word (קדם qâdam) the idea that days of anguish came in an unexpected manner, or that they anticipated the fulfillment of his plans. All his schemes and hopes of life had been anticipated by these overwhelming sorrows.