A badly sunburned face or back is extremely painful.

严重晒伤了的脸或背部是非常疼痛的。

《柯林斯英汉双解大词典》

Genuine criticism creates a precious opening for an author to become better on his own terms—a process that is often extremely painful, but also almost always meaningful.

诚恳的批评为作者创造了一个宝贵的机会，让他在自己的领域变得更好——这个过程通常极其痛苦，但往往都是有意义的。

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Many said that unemployment, while extremely painful, had improved them in some ways: they had become less materialistic and more financially prudent; they were more aware of the struggles of others.

许多人说，失业虽然极其痛苦，却在某些方面改善了他们的生活：他们变得不那么物质主义，在财务上更加谨慎了，并且更加了解别人的难处。

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If he had, he would have turned down the job and avoided an extremely painful experience.

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Admissions for quinsy - an extremely painful complication of acute tonsillitis - is rising.

BBC: UK 'doing too few tonsil operations'

While some are extremely painful, vertebral fractures are often asymptomatic until the spine begins to collapse.

WSJ: Health Journal: Yes, You Are Getting Shorter