Kissing a deceased person on the lips carries significantly higher health risks than kissing them on the forehead, mainly due to the mouth’s role in harboring bodily fluids and infectious agents. After death, the body may still carry viable pathogens, especially in the oral cavity, which can be a gateway for transmission.

The mouth is a common site for bacteria and viruses such as tuberculosis, hepatitis B and C, COVID-19, and herpes simplex. These organisms can linger in saliva, mucus, or blood. If someone with a compromised immune system or open sores on their lips kisses the deceased on the mouth, they may be at risk of infection.

Additionally, bodily fluids can leak from the mouth and nose shortly after death, as muscles relax. These fluids may contain harmful microorganisms or toxins, making direct contact during a kiss particularly unsafe. Unlike the forehead, the lips are moist and in close proximity to mucous membranes, increasing the risk of transmission.

Decomposition also begins quickly in the mouth. Anaerobic bacteria multiply in this area, producing foul odors and potentially hazardous gases. In warm conditions, this process accelerates, making the lips an even more dangerous area for contact shortly after death.

There are also chemical risks if the body has been embalmed. Substances like formaldehyde may still be present on the lips and can cause chemical burns or allergic reactions. Sensitive tissues like the lips are especially vulnerable to irritation or harm from these embalming agents.

To express farewell more safely, people are encouraged to avoid kissing the lips. Instead, touching the hands, forehead, hair, or placing a flower near the body can offer a meaningful and respectful goodbye while minimizing health risks. Spoken words or quiet moments nearby can provide comfort without the need for high-risk contact.