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Description
It depends, right

Most clients describe the sensation as a brief pinch or pressure that quickly subsides

Y., Lou K

10.1097/00000637-199206000-00008 10 CasalD.Mota-SilvaE.IriaI.AlvesS.FarinhoA.PenC.et al (2018)

Lipohypertrophy involves fat accumulation at injection sites due to the lipogenic effects of repeated injections in the same small area
