That's why we added a little 'catch lid' in the top of the can. Zyn nicotine pouches are not necessarily bad for your gums, but they can contribute to a number of dental and gum problems over time. A cough and sore throat are also symptoms of nicotine withdrawal. Prilla Deep Dive: What is ZYN? Are Nicotine Pouches Bad For Your Gums? ZYN Mini Dry Cool Mint is aptly named it delivers a cooling menthol flavor with notes of peppermint.