Hi welcome to Health care magic forum.
Thanks for calling H.C.M.Forum.
You are having itchy skin, raised bumps, pimples
under arms, pimples on coller bone. You have used prednisolone
, antihistamines, and permethrine cream, but in vain.You have allergy
that is right, but there is associated super infection .
When ever there is infection you are expected to use antibiotics along with medicines for controlling allergy. So i advise you to consult a dermatologist
for diagnosis and treatment. If you have any doubts you can approach H.C.M.
Wishing for a quick recovery .