Thanks for the query,
You might be suffering from urticaria
It presents in the form of itchy lesion on the body.
It is difficult to find out the cause.
It can vary from food to any other thing like dress, perfume etc.
You can apply cortisone
It is a mild steroid and can be safely used.
You should also take an anti histamine
Prolonged use of anti histamine tablet will give you better relief.
Please meet a dermatologist
for exact diagnosis.
Let me know if you have any other doubt.
you can ask a direct question to me on this forum, following the below link.