Hello dear,
Thanks for the query.
I think you are suffering from allergic contact dermatitis, In this condition allergy to any thing worn or even any thing inhaled, like pollen grains can cause itching.
As this is the season when most flowers blossom and release pollen, your condition can be related to this, just for conformation I would request you to upload a few pictures of the rash, this will help me in giving closer diagnosis.

For now to get instant relief apply hydrocortisone lotion and take an antihistamine tablet like cetrizine.

Let me know if you have any other doubts.
Thank you

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