Medicinal use:

Jatropha curcas is a natural strong painkiller. An extract from the leaves of Jatropha curcas offers pain relief similar to that of aspirin or similar pain relief drugs. 100mg/kg of Jatropha curcas dose is enough to produce pain relief medication whereas 400mg/kg of aspirin is required for pain relief in traditional medicine (source). This is more effective pain-relieving drug without addiction and side effect.

Jatropha has antimicrobial called “sap”, that can be used to treat a toothache due to cavities. The roots are used in decoction as a mouthwash for bleeding gums and toothache. According to tests conducted on the shrub, the seeds oil a strong purgative widely used to soothe pain caused by rheumatism (source).

About the plant:

Jatropha curcas grows in tropical and subtropical areas or regions and can grow on almost any terrain or even on wasteland. It is a smooth, erect branched shrub that grows 2–5 meters high. The branches are stout, cylindric and always green.

How to grow:

Jatropha curcas can be planted in a desert climate, it thrives on any type of soil, it grows almost anywhere in sandy, gravelly, saline soil and rocky crevices. It is a drought resistant perennial plant living up to 50 years, it has no insect pest. It is mainly propagated by cuttings and can grow on poor and stony soils.

Parts used:

Whole plant

How to use:

The fresh bark is cut into small pieces and chewed or kept in the mouth for 1 – 2 hours in order to treat pyorrhoea(Bleeding gums). Use leave decoction as a mouthwash. To reduce pain caused by rheumatism, roast 3-4 Jatropha curcas seeds and take them with lukewarm water.

Caution:

Consult an Ayurvedic Doctor before consuming the herb.

Vernacular names:

Common name: Physic Nut, Jatropha, Barbados nut
Hindi: Jamal ghota, Ratanjot, Jangli arandi
Manipuri: Awa kege
Marathi: Mogli Erand, Maraharalu
Tamil: Kattukkotai
Malayalam: Kattamank, Katalavanakku
Telugu: Nepalam, Adavi amudam
Kannada: Kananeranda
Bengali: Bagbherenda, Bherenda, Sada verenda
Oriya: Jahazigaba, Dhalajahaji
Konkani: Mogli erandi
Assamese: Salika kund, Bongali-botora, Bongali era
Gujarati: Radau-khurung, Jamalgota
Sanskrit: Darvanti
Mizo: Kangdamdawi, Thingthau
Nepali: Sajiwan, Hattikaane, Nirguni, Arin

References:

http://petalpolymer.com/en/node/1
http://www.thehindu.com/sci-tech/health/medicine-and-research/jatropha-curcas-acts-as-natural-painkiller/article2221519.ece