Getting the recommended seven to nine hours of sleep is not always simple, and a range of conditions can interfere with rest. Among the more unusually named problems is exploding head syndrome, a disorder that sounds severe but is described as harmless.

The condition is associated with hearing a sudden bump, bang or similar noise during the night. For someone experiencing it, the sensation can be deeply unsettling, especially when it seems to come out of nowhere and interrupts sleep.

Despite its alarming name, exploding head syndrome is not presented as dangerous. The bigger issue is the disruption it can cause, adding another challenge for people already dealing with nighttime sleep problems.

It joins other well-known sleep-related conditions, such as obstructive sleep apnea and restless leg syndrome, in showing how many different ways sleep can be affected. In this case, the name may be the scariest part, even though the disorder itself is considered harmless.