Slept across 2 seats on bus. 24 hours later severe back pain radiating to side and abdomen. worse when lying down. is this related to bus trip? help!

Back pain: Hi, most probably, due to the position in the bus you have developed muscle spasm which is causing your pain, a muscle relaxant, heat pad, stretch exercise, Anti inflammatory medications like Ibuprofen can help. Feel better soon.

Back pain.: Sounds very uncomfortable. It could certainly be due to sleeping in such a position, but also other more worrisome causes of back pain. If it doesn't improve within a week, best to see a physician. Back strain/sprain is very painful.