Why can pericoronitis become life-threatening?

Pericoronitis can become life-threatening primarily because it can lead to systemic infections originating from the oral cavity. This condition typically occurs when there is inflammation and infection in the tissue surrounding a partially erupted tooth, often the wisdom teeth. If the infection is not treated adequately, it can spread to adjacent tissues and even enter the bloodstream, resulting in serious health issues such as sepsis.

Infections stemming from dental issues like pericoronitis can rapidly escalate in severity, especially if the bacteria involved are virulent or if the individual has a compromised immune system. This potential for a localized infection to develop into a systemic one illustrates the importance of proper dental hygiene and timely intervention when pericoronitis is suspected.

The other options, while they relate to the effects of pericoronitis, do not capture the primary concern regarding its seriousness. For example, while severe pain can indeed limit movement, it does not directly threaten life. Immediate tooth loss is a possible outcome, but it is not the primary danger. Affecting digestion and overall health is also a concern, yet ultimately, the risk of systemic infection more directly answers the question of how pericoronitis can pose life-threatening risks.