Researchers also found that oxygen could stop the headache pain and eliminate other symptoms associated with cluster headaches, such as red,swollen and watery eyes.

VOA: standard.2009.12.17

Stop the pain! Make it go away!

我不要痛，住手！

耶鲁公开课 - 死亡课程节选

But if a medication can block the capsaicin-like molecule from reaching the neuron, it could stop the brain from ever registering there was any pain to begin with.

VOA: standard.2010.05.04