A back problem is a medical condition that affects the muscles, nerves, and bones of the back. The term 'back problem' can refer to a variety of conditions, including STRAIN (6 letters), ACHE (4 letters), SPASM (5 letters), lumbago (7 letters), ITCH (4 letters), KNOT (4 letters), slippeddisc (11 letters), and slippeddisk (11 letters). These conditions can cause pain, discomfort, and limited mobility in the back. Treatment for back problems can include physical therapy, medications, and lifestyle changes.