Complex sentence: This piercing can sometimes lead to'septal hematoma'--an injury to the soft tissue within the septum that can disrupt the blood vessels to cause the accumulation of blood and fluid under the lining.
Split into simpler sentences: This piercing can sometimes lead to'septal hematoma'. An injury to the soft tissue within the septum can disrupt the blood vessels to cause the accumulation of blood and fluid under the lining.