Because a relatively sealed environment will be formed between the mask and the face during wearing, when the mask is worn for a long time, impurities such as sweat, grease and dust on the face will be mixed together to block pores, making the face moist and oily, and bacteria will grow, which may lead to pimples. When pimples appear under the chin, it is first necessary to clean and moisturize the face and stop using some. 2 reduce the wearing frequency

because the acne is mainly caused by the airtight condition of the mask, it is also necessary to reduce the wearing frequency of the mask as much as possible. For example, when you are in your own home or go to a place where there is no one, you can try not to wear the mask, which can keep your skin dry and thus alleviate the acne. 3. Ventilation in time

If you are in a middle or high-risk area and have to wear a mask all the time, it is suggested that you can go to an empty and uninhabited place in time during the process of wearing a mask, and then take off the mask to ventilate, which can also alleviate the chin acne to some extent. 4 eat more vegetables and fruits

acne is mainly caused by excessive oil secretion, and also has a certain relationship with personal endocrine disorders. Therefore, when acne occurs on the chin, you should also keep your diet light, avoid eating spicy, greasy, cold and irritating foods, and eat more fresh vegetables and fruits.