It is unclear when cannabis first became known for its psychoactive properties. The oldest archeological evidence for the burning of cannabis was found in Romanian kurgans dated 3,500 BC, and scholars suggest that the drug was first used in ritual ceremonies by Proto-Indo-European tribes living in the Pontic-Caspian steppe during the Chalcolithic period, a custom they eventually spread throughout western Eurasia during the Indo-European migrations. Some research suggests that the ancient Indo-Iranian drug soma, mentioned in the Vedas, sometimes contained cannabis. This is based on the discovery of a basin containing cannabis in a shrine of the second millennium BC in Turkmenistan.Cannabis was known to the ancient Assyrians, who discovered its psychoactive properties through the Iranians. Using it in some religious ceremonies, they called it qunubu (meaning "way to produce smoke"), a probable origin of the modern word "cannabis". The Iranians also introduced cannabis to the Scythians, Thracians and Dacians, whose shamans (the kapnobatai – "those who walk on smoke/clouds") burned cannabis infructescences to induce trance. The plant was used in China before 2800 BC, and found therapeutic use in India by 1000 BC, where it was used in food and drink, including bhang. Cannabis has an ancient history of ritual use and has been used by religions around the world. The earliest evidence of cannabis smoking has been found in the 2,500-year-old tombs of Jirzankal Cemetery in the Pamir Mountains in Western China, where cannabis residue were found in burners with charred pebbles possibly used during funeral rituals.
Attacks of abdominal pain lasting 1–72 hours (untreated or unsuccessfully treated)
C. Abdominal pain has all of the following characteristics:
1. midline location, periumbilical or poorly localized
2. dull or "just sore" quality
3. moderate or severe intensity
D. During abdominal pain at least 2 of the following:
1. loss of appetite
2. nausea
3. vomiting
4. pallor
E. Not attributed to another disorder

Differential diagnosis
Abdominal migraine must be distinguished from other causes of chronic or recurrent abdominal pain. These include irritable bowel syndrome, peptic ulcer disease, gastroesophageal reflux disease, mast cell activation syndrome, and celiac artery compression syndrome. It must also be distinguished from causes of acute abdominal pain, such as appendicitis, as wrong diagnosis may lead to unnecessary appendectomy. Treatment
Short term
Analgesia may be effective against abdominal migraine in some patients. Avoidance of intense light tends to have a short-term beneficial effect. Long term
Avoidance of triggers can be very helpful. Medications such as pizotifen, propanolol, and cyproheptadine may be used in rare circumstances. Prognosis
Abdominal migraine can have a significant impact on day-to-day life. Children may miss school or other activities. It resolves in many patients. Prognosis is generally good in children, but variable in adults. Epidemiology
Abdominal migraine primarily affects children, for whom it is a common cause of chronic abdominal pain. It may be as high as 9% or as low as 1% among children. It is rare in adults. However, children diagnosed with abdominal migraines may have migraine headaches as adults. The mean age of diagnosis is 7 years. It appears to be slightly more common in women.