In this particular period, because of hormone levels that are established during breastfeeding, cellulite becomes more evident and it is very difficult to lose weight: prolactin, in fact, leads to considerable fluid retention, a prerequisite for the production of milk. Generally, experts advise against starting a low-calorie diet and/or exercise program aimed at weight loss while a woman is breast feeding, because milk production could be affected.
And also as regards cosmetic treatment and food supplements, for the same reasons mentioned above, I advise you to defer their use until the end of breastfeeding: anti-cellulite/slimming products always result in drainage of the fluids present in the tissues, which is counterproductive for milk production.

Due to the particular level of certain hormones during pregnancy, a woman’s skin becomes more sensitive and likely to show sensitization reactions.
As a consequence, products such as anti-cellulite* ones, which stimulate the skin, could cause redness and itching.
I would suggest Cell-Plus Crema Rassodante with FRV be applied on the stomach, hips and bust to prevent the appearance of stretch marks.
*skin appearance
Furthermore, bear in mind that it is quite normal that, during pregnancy and breastfeeding, fluid retention in the tissues increases due to hormones. It would actually be counterproductive to undergo treatment of any kind to reduce the volume of fluid in the tissues: women need to accumulate fluid for the continuous replacement of amniotic fluid and, later on, to produce milk.