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It is very difficult to precisely confirm a diagnosis without examination and investigations and the answer is based on the medical information provided.
Based on the symptoms it appears to be contact dermatitis
Treatment includes washing with lots of water to remove any traces of the irritant that may remain on the skin. You should avoid further exposure to known irritants or allergens.
In some cases, the best treatment is to do nothing to the area.
Emollients or moisturizers help keep the skin moist, and also help skin repair
itself. They protect the skin from becoming inflamed again. They are a key part of preventing and treating contact dermatitis.
Corticosteroid skin creams or ointments
may reduce inflammation. Carefully follow the instructions when using these creams. Overuse, even of low-strength over-the-counter products, may cause a skin condition.
I advice you to follow the conservative approach as mentioned and if symptom persists i advice you to see dermatologist
for exact diagnosis.
Hope I have provided the information you needed.
Wish you good health. Take care.