How do you get a soft spot on the top of an adult head?

A soft spot on the top of an adult head, often referred to as a "fontanelle," typically indicates a condition related to bone development or a medical issue, as adults normally do not have soft spots due to the fusion of skull bones during growth. If an adult experiences a soft or bulging area on the skull, it may result from trauma, a medical condition like craniOSynostosis, or other underlying issues. It's essential to consult a healthcare professional for proper diagnosis and treatment.