Why does my back fat hurt? September 11, 2022December 28, 2023BRA 0 Excess belly fat eventually causes the pelvis and lower back to slant forward. This creates a permanent and round arch in the back, which causes back pain. The strongest muscles are in the back. Post Views: 166Related Posts:Why does the fat on my back hurt?Does your back hurt if you're fat?Why does my top upper back hurt?See also How do you lose back fat without exercise?