But headache sufferers needn't wait around for such results.

不过，头痛患者不必等着这些结果。

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My colour television has given me nothing but a headache.

我的彩电尽让我头疼了。

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Such a headache causes severe pain that goes away but returns later.

VOA: special.2010.03.30

But a bigger headache has been lack of funding which has prevented the tram extension in parallel with construction work at the site.

ECONOMIST: Urban regeneration

But the main headache for Mr Morales is the economy.

ECONOMIST: Bolivia's Evo Morales: The calle gets restive | The

The issue came into sharp relief in 2011, when China's food-safety inspectors discovered in pork products from a Shuanghui subsidiary the chemical clenbuterol, which speeds muscle growth in pigs but can cause headache, nausea and an irregular heartbeat when consumed by humans.

WSJ: 'China's No. 1 Butcher' Turns to U.S.