A kiss mark (Usually on the neck) is caused by the one doing the kissing sucking a little bit to hard. This can cause some of the surface blood vessels to break, hence the red mark left on the neck. If the sucking is really powerful enough blood can break through the skin. It would be wise to keep an eye on the injury to see that it does not become inflamed or festers. In which case I would suggest a visit to the doctor.
Chat with our AI personalities