Why is it so important to rotate where I inject my insulin?

Consistently injecting insulin into the exact same spot can lead to a condition called lipohypertrophy, which is the buildup of hard, rubbery fatty tissue under the skin. Not only can these lumps be visually noticeable and uncomfortable, but they also severely disrupt how insulin is absorbed. If insulin is injected into one of these hardened areas, it may absorb too slowly or unpredictably, leading to unexplained high blood sugar or sudden, delayed crashes. To ensure smooth, predictable absorption, it is vital to rotate injection sites across the abdomen, thighs, buttocks, and upper arms, staying at least two inches away from the belly button.