yes it may cause cancer when applied on your body since it blocks sweat glands`

There's no denying that deodorants help to neutralise or block body odour. Also the fact that antiperspirants usually contain aluminum compounds which block the sweat glands and reduce the amount of sweat produced. And if there is no sweat, bacteria cannot act on proteins in the body to produce odour. Dermatologist Dr Sunita More warns about the unpleasant effects of these products. Most of these products contain aluminium and parabens which mimic the female hormone estrogen and act on breast tissue, so individuals with family history of breast cancer should avoid their use.