A method of cosmetic treatment to locally reduce adipose tissue in a local region of the abdominal area, the area of the buttocks, a limb, an arm, a leg, the waist or the side of the body of a subject that is not a baby, comprising: (a) applying cooling means of a device in a defined area of the subject's skin in a local region where it is desired to reduce subcutaneous adipose tissue； (b) use at least one feedback device to control temperature and / or crystal formation to provide response information； characterized in that it further comprises (c) controlling the cooling means by means of a control unit based on information received from at least one feedback device, in which the lipid-rich cells in said local region, are cooled to a temperature between about -10 ° C up to about 10 ° C for up to two hours so that there are selectively broken lipid-rich cells, and simultaneously keep the subject's skin at a temperature according to which the cells are not broken non-rich lipid cells near the cooling medium and non-rich lipid cells surrounding the subcutaneous fatty tissue, and (d) modify a shape of the local region to mold a surface of the local region.Un método de tratamiento cosmético para reducir de manera local el tejido adiposo en una región local de la zona abdominal, la zona de las nalgas, una extremidad, un brazo, una pierna, la cintura o el costado del cuerpo de un sujeto que no es un bebé, que comprende: (a) aplicar medios de enfriamiento de un dispositivo en un área definida de la piel del sujeto en una región local donde se desee reducir el tejido adiposo subcutáneo； (b) utilizar al menos un dispositivo de retroalimentación para controlar la temperatura y/o la formación de cristales para proporcionar información de respuesta； caracterizada porque comprende además (c) controlar los medios de enfriamiento mediante una unidad control basada en información recibida de al menos un dispositivo de retroalimentación, en el que las células ricas en lípidos en di
