Maybe allergic react. Try over the counter ointmint-hydrocortizone 10. Not the cream. 3 to 5 days you will notice improvement. Your bra could be the culprit. Or your body soap.
Areola bumps. Red bumps on the areola may represent several different types of growths. Some (montgomery) papules are related to the glands. Itchy bumps could be scabies, an infection that needs treatment, benign keratoses, moles, etc. As these are new you should see a dermatologist for evaluation and to rule out anything serious.