Learn Russian: После обморока у него болит голова.

While его голова болит is grammatically understandable, Russians overwhelmingly prefer the construction у + [Genitive person] + болит + [Nominative body part] for physical ailments. It frames the pain as a state happening to the person, rather than treating the body part as an independent actor.

What is the origin of the word обморок?

The noun обморок (a faint) contains the root морок, which refers to darkness, gloom, or confusion. It is related to мрак (darkness) and the verb морочить (to fool or confuse). Fainting is literally a state where your vision goes dark!

If обморок is a noun, what verb do we use for the action of fainting?

Russian uses the phrase упасть в обморок (perfective), which translates literally as 'to fall into a faint'. The imperfective equivalent is падать в обморок.

This lesson focuses on the до- ... -ся pattern for negative limits. How might that connect to this sentence?

Although this sentence doesn't use that specific verb pattern, обморок frequently acts as the negative limit those verbs reach! Verbs with до- ... -ся are often followed by the preposition до + Genitive. For example, you could say Он доигрался до обморока, which means 'He messed around to the point of fainting'.