The old cliche about headaches is that a partner feigns one in order to get out of sex. (We all know that no one should need to fake anything to get out of sex, but that’s by the by) But actually the relationship between sex and headaches is more complicated than that – with sex sometimes causing headaches. According to the NHS, if having sex (or having an orgasm) gives you a headache, it’s probably related to tension. It’s listed as one of the top 10 causes of headaches by the NHS, who explain: ‘Doctors think sex headaches are due to pressure building up in the head and neck muscles. The headaches can happen during foreplay or just before orgasm, and can last for a few minutes or up to an hour. The good news is that a sex headache probably doesn’t suggest any horrific underlying issues. According to the NHS: ‘Sex headaches are inconvenient, but these headaches are usually harmless and don’t mean you have to avoid sex. Take a painkiller a few hours beforehand to block the headache.’ MORE: FOOD Kellogg’s launches white chocolate Coco Pops Could this Chinese spirit – known as ‘liquid razor blades’ – become a big hit in the UK? I have anxiety and having a blue badge will change my life A paper written on the subject of headaches associated with sexual activity (HSA) says that the topic needs to be taken more seriously and given more exploration, as they ‘can cause an ongoing negative affect on a person’s sex life.’ The paper also found that HSA affects around 1% of the population and is 3-4 times more common in men – though it also acknowledges that the problem may be underreported due to embarassment and therefore could affect a larger number of people. On the upside, orgasms can also have a positive effect on pain. Many women find that having an orgasm helps to alleviate menstrual cramps. So that’s nice.