An irritant dermatitis.Where I live blisterbeetle dermatitis,A little paraffin application will do.Pain can be treated with paracetamol.
From the symptoms,it sounds like contact dermatitis.Do not apply triamcinolone as tighntess of the throat means either sore throat or an allergic reaction to the medicine. Avoid using any lotions and creams over the skin for the meantime. Wash it with a mild cleanser with moisturizing properties like Cetaphil. Pat it dry. Then apply a good hypoallergenic moisturizer over the area and see if this improves.If the symptoms still persist then you can apply mild steroid like dermacort.
If the irritation persists then pls get it evaluated from a dermatologist.
I hope it helps.Take care and pls do keep me posted on how you are doing or if you have any additional doubts.Kind regards.