To be the cause of pain.

剧烈的疼痛、痛苦等。

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The illusion of separateness is the cause of pain, and it is also part of the cause of all the works of beauty people have created.

分离的幻象是造成痛苦的原因，也是人们创造美的作品的部分原因。

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Information about what aggravates and relieves your pain will help your doctor understand the cause of pain and find the best medications and appropriate doses to treat you.

这些关于怎样会加重或减轻你的疼痛的信息，可以帮助你的主治医师去了解你疼痛的原因，并给你开最有效以及合适剂量的药物。

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And identifying the cause of the pain can be difficult, especially for untrained doctors.

VOA: special.2011.07.26

If we torture this one-- of course to torture,you cause pain to bodies, but the pain gets felt in the mind.

如果我们折磨这个-,当然了，折磨会在肉体上产生痛苦，而痛苦可以被意识感知。

耶鲁公开课 - 死亡课程节选

What they do is when people enter the group they humiliate them, they cause them pain, they cause them various forms of torture and unpleasantness.

当有人加入这个机构时，他们会欺凌他们，让他们痛苦不堪，让他们承受各种各样的折磨和不快。

耶鲁公开课 - 心理学导论课程节选

Sarno realized that unresolved emotional issues and not physical abnormalities, such as bulging discs or muscular tears, were the cause of the pain outbreak sweeping the nation.

FORBES: How America's Best Pain Doctor - John Sarno - Took On The Medical Establishment and Won

Treatment depends on the cause of the pain and may involve pain relievers such as ibuprofen or acetaminophen, application of ice or heat, stretching, massage and rest.

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People with nonspecific-type thoracic outlet syndrome have chronic pain in the area of the thoracic outlet that worsens with activity, but the specific cause of the pain can't be determined.

CNN: Thoracic outlet syndrome