Mouthwash is a dental cleaning products, oral use, touching the mucous membrane without harm, and in the production of production also take into account that there will be swallowing this situation, so the residue of mouthwash less swallowed usually no effect, no need to overstress. If the patient residual more after swallowing it is recommended to drink some milk, because the mouthwash may contain some drugs or alcohol may stimulate the gastrointestinal tract mucosa damage, drinking milk can play a role in protecting the mucosa. In addition, the need to carefully select mouthwash, mouthwash is divided into two categories of cleaning and medicinal. The role of clean mouthwash is to eliminate oral odor, remove the remaining food residue in the mouth, no other special contraindications, can be used after meals or any occasion. Medicinal mouthwash dose, course and method are required to follow medical advice, can play a role in the prevention of dental caries, sterilization and anti-inflammatory, pain relief, etc., when the oral or pharyngeal disease is cured, need to stop using mouthwash, so as not to lead to the normal oral flora disorders or resistance to drugs. At the same time, mouthwash can only take away part of the teeth attached to the food residue, can not remove plaque on the teeth, can not replace the daily brushing, daily life should also brush your teeth on time to maintain oral hygiene. In addition, if you swallow a lot of mouthwash, you may experience abdominal pain, dizziness, vomiting and other discomfort, it is recommended to seek medical attention, at this time may require gastric lavage treatment.