Organic Peppermint oil has many historical uses.  It has been used in cramps, anti nausea, headaches, antimicrobial, central nervous system stimulant, dental health, cardiovascular uses, anti inflammatory, pulmonary uses and antispasmodic.  This is not an exhaustive list.  

At Superstuff we have found that it is the only thing that relieves the itch from  no see ums.   It also seemed to shorten the lifespan of most bites.  

Research on pruritus in pregnant  women               https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3813175/

Research on the use of peppermint oil for IBS
  https://www.bmj.com/content/337/bmj.a2313.full

Research using pepperming oil for postoperative nausea     https://pubmed.ncbi.nlm.nih.gov/27333231/

Various uses of peppermint oil     http://nopr.niscair.res.in/handle/123456789/9437

This information is not to be considered medical advice or take the place of a doctor visit.