Thanks for the query.
You might be suffering from urticaria
can help you but at the same time it has many side effects.
Better take treatment with anti histamines
Also try to find out what exactly is causing this rash.
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.
Wishing you a good health.