https://www.selleckchem.com/pr....oducts/momordin-ic.h
Nummular headache (NH) is an uncommon primary headache characterized by pain limited to a precise small area of the scalp. There is no global consensus on its pathogenesis, but its extracranial origin is the most accepted theory. Moreover, peripheral mechanism is supported by the overlapping symptomatology of secondary forms of NH and is well described in the literature. However, a standard effective treatment is still lacking. A literature search according to Preferred Reporting Items for Systematic Reviews and Meta-Analysis guidel