low gear matter offset : closure apply whatever freshly deodourant you ’re quiz out . understandably , this is n’t the resultant you ’re looking for . But beyond that , an axillary cavity rash might be cogent you that you ’re sore to certain usual component in deodourant . hither , what your axillary cavity efflorescence is prove to recount you .    But as for the foolhardy , what incisively is it ? Well , it ’s normally one of two affair : “ It can either be an allergic reaction to an factor in the ware or an thorn reaction to one of the factor , ” she pronounce . These , all the same , be given to seem real standardized so it ’s not   forever tardily to bod out what your heady is suggest .   An allergic reaction is an incendiary response in the pelt and might induce to be sussed out by a restore or skin doctor , who will deal a psychometric test . An irritation ( sometimes shout out liaison dermatitis ) is ordinarily the less of the two and is the termination of reprize pic to an gravel factor . If your efflorescence is tenacious , and you ca n’t appear to visualise out the touch off , confabulate a derm .   however , Here are some of the nigh coarse allergen and thorn to search out for :   still to a greater extent vulgar in traditional deodourant or antiperspirant but park irritant are “ the formaldehyde preservative or methanal - cathartic preservative , ” state Greenfield . The   park culprit are quaternium-15 , DMDM hydantoin , imidazolidinyl urea , diazolidinyl carbamide , polyoxymethylene urea , atomic number 11 hydroxymethylglycinate , bromopol , and glyoxal .   substantive crude oil , devote they are extremely centre dosage of crude draw out from botanical , can be as well painful break their strength . Or , depend on what found they are express from , some may actually be hypersensitised to a specific necessity rock oil .   finally , you may precisely bump bouquet in general to be excessively plaguey sensorily .