Why do I get headaches after sex?

Headaches triggered by sex are a recognized phenomenon - primary headache associated with sexual activity - and they come in two shapes: a dull ache in the head and neck that builds as arousal builds, or a sudden explosive thunderclap headache at or just before orgasm. In people who get them recurrently, they are usually benign - thought to involve the blood pressure spike and muscle tension of arousal - more common in men and in migraine-prone people, and they often come in clusters for weeks or months then stop. Preventive options exist, including taking a triptan or an anti-inflammatory before sex, prescribed by a provider once the diagnosis is confirmed. The critical caveat is the first one. A sudden severe headache at orgasm is also the presentation of a brain bleed - a ruptured aneurysm or hemorrhage - and there is no way to tell benign from dangerous at home on the first occurrence. The rule: a first-ever thunderclap headache during sex - sudden, worst-of-your-life, peaking within seconds - needs emergency assessment the same day. So does any sex headache with vomiting, stiff neck, confusion, weakness, or vision loss. Once a provider has cleared you and the pattern repeats benignly, it joins the manageable list. After clearance, what helps: pause at the first build of the headache, note whether certain positions or exertion levels trigger it, stay hydrated, and mention it to your provider openly - they have heard it before and there are real preventives. Pymander is a free AI doctor, 24/7 by text. Describe the headache shape and timing, and it can help you judge urgency.