Thanks for posting you query.
You are right hormone like estrogen
can cause skin redness, rash or vein visibility. But red spot and itch associated with periods suggests Autoimmune progesterone dermatitis
, which is due to allergy
to progesterone hormone. It is diagnosed on the basis of cyclic presentation and a skin-prick test with intradermal progesterone.
You are advised to visit your doctor, once it is diagnosed then it can be managed with topical steroids
Hope it helps.