Hi..
Can understand your concern..
As per your complain itching in armpit can occur due to a number of reasons..
It can be due to poor maintenance of hygiene leading to infection and causing itching..
It can also be due to allergy to any soap or body shampoo, perfumes or deodorants or the detergent used to wash clothes..
Other reasons can be due to
excessive sweating known as Axillary Hyperhydrosis leading to excessive sweating for no reason and can cause itching due to continuous wetness and infection..
Some medical problems like Psoriasis and Militia rubra( it causes clogging of sweat glands in the armpits) can also cause itching..
I would suggest you to
consult a dermatologist and get evaluatedfor the exact cause of the problem and get treated accordingly, as only steroids can't help in all conditions..
For swollen gums with white centre is a result of infection in the gums with pus formation as you explained that
tooth infection was not found in the x ray..
For
gum infection professional cleaning of the gums and teeth along with antibiotics like amoxicillin and
metronidazole and gum paint can help..
Hope your query is solved..
Thanks and regards..
Dr.Honey Nandwani Arora..