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[[File:Eyes (2461469537)Acmella_oleracea_002.jpgJPG|200px|thumb|right|''Toothache plant'']]'''Toothache plant''' is an upright or a prostrate perennial plant. The plant is often cultivated as an annual for its edible leaves in parts of the tropics, especially Brazil. It is also grown widely as an ornamental because of the attractive colourful heads .

The most important taste-active molecules present are fatty acid amides such as spilanthol, which is responsible for the trigeminal and saliva-inducing effects of products such as jambú jambu oleoresin, a concentrated extract of the plant.<ref name="Chemical Composition"/>

{{Common names|sa=|en=Toothache Plant, Para cress|guhi=Akarkar|himr=Akarkar, Pipulka|kn=Hemmugalu|ks=|ml=|mr=|pa=|ta=|te=}} ==Properties== 

{{Flower|Unisexual|2-4cm long|pinkPink|4-5|Heads in axillary or terminal panicles, Heads often 2 coloured, yellow and reddish-brown}}

{{Fruit|Achene|Achenes monomorphic, upto 2 mm long, laterally compressed, ciliate at the edges. Pappus of 2 or 1 bristle or absent. |||seeds Seeds upto 5|Fruiting throughout the year}}

Acmella Oleracea - പല്ലുവേദനചെടി 02.JPG|Flower

<ref name="Chemical Composition">[https://www.jpsr.pharmainfo.in/Documents/Volumes/vol9Issue08/jpsr09081722.pdf"chemistry"Chemistry]</ref>

<ref name="Leaf">[https://indiabiodiversity.org/species/show/32002 "morphology"Morphology]</ref>

<ref name="How to plant/cultivate">[http://tropical.theferns.info/viewtropical.phid=Acmella+oleracea "Cultivation"]</ref>