Bacterial acne typically invades the oily skin areas such as the forehead, nose, and cheeks – this can be the presence of red, tender, and frequently inflamed cysts, pustules, and pimples. Bacterial acne can be further triggered by medications, diet and genetics. It's incredibly important to treat this acne type with gentle, nurturing ingredients that won't further inflame your breakouts.47 Skin Serum (£29) uses silver chitoderm which has been clinically proven to reduce inflammation and cause your skin cells to regenerate, whilst still being gentle and hydrating on your skin.