Hello. Welcome to ask the doctor.
As per details, it seems that you are suffering from Allergic Contact Dermatitis.
It is an allergic condition of the skin caused by the use of cosmetics, deodorants, perfumes, new clothing, soap etc.
In such cases, I prefer to advise topical steroid like hydrocortisone.
The first and foremost important is to avoid the use of implicated factor.
In your case, it is most likely due to deodorant use. Do not put it directly on the skin. Rather spray it over clothes.
Visit your doctor so that he can examine you and give you a prescription accordingly.
Till then you may take antihistaminics like Levocetirizine for symptomatic relief.
I hope it helps.
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