Can I increase my breasts by using any lotion or cream?

No, There is no creams, lotions or potions to increase your breast size - no matter what any company claims. The only option to increase breast size is by breast augmentation (implant or fat grafting).

I do not know of any topical agents that are known to increase breast tissue. Your options are to either gain weight or to have a breast augmentation with either implants or fat grafting.