Hello It was just co incidence , that you develop rashes after you ate peanuts or chocolates or drank coffee ,because as you mentioned that this time , these rashes developed even without these items , so such type of rashes may be due to these reasons, these include 1 Seasonal allergic reactions , e.g. sudden increase or decrease in temperature or due to allergy to any allergen like , food , mold, pollen , pests , dust , smoking ( active or passive ) . For exact diagnosis , consult an Immunologist and get in allergy tests. 2 Worm infestation is the another possibility of such symptoms . Diagnosis can be confirmed by stool examination as well blood examination. 3 Tropical eosinophilia , some times this may be the reason of such rashes . Diagnosis can be confirmed by blood examination for eosinophils count. However there are so many other reasons of such symptoms like wheat allergy , lactose intolerance etc . This is not serious but treatment is important so get in done allergy test. Consultation with an Immunologist is important. Good luck.