Hi. Thanks for your query. Noted your history of getting bumps on the hand on scratching, or by a paper cut and it disappears after a couple of minutes. The probable reasons are: Exaggerated response of the body to a stimulus and this looks physiological as the bumps disappear within few minutes. Another reasons can be very sensitive histamine response of the body which the body takes care of immediately. Another possibility is that there was exposure to some allergens in the past which have caused this sort of hypersensitive response. I would advise you to undergo the tests of blood, urine and stool. Get a clinical evaluation, examination and investigations as may be decided by your Doctor. Special tests may be needed. Get a course of an antihistamine, steroids, dewormin and as may be suggested by your Doctor. Avoid any such things that can cause this phenomenon.