Hemicrania continua

Hemicrania continua is a primary headache that is more common in women, lasts at least 3 months without relief, is unilateral with a variable course of moderate to severe intensity with at least one of the following symptoms : and relief with Indomethacin treatment.
 * conjunctival injection, lacrimation, or both;
 * nasal congestion, rhinorrhea, or both;
 * ptosis, miosis or both;

PET can show changes in the mesencephalus, which distinguishes hemicrania from migraine and cluster headache. Indomethacin is used in therapy at a dose of 75-150 mg / day and is also used to prevent new episodes. Indomethacin treatment can be lifelong, although the dose may be reduced over time.

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