welcome,
consult dermatologist for physical examination,
most common cause is
atopic dermatitis (eczema),treatment include-
steroid cream/ointment applied topically,
immune modulator tacrolimus topically,
tablet allegera or levocetrizine for itching in morning-non sedative,
tablet
benadryl or atarax in evening-sedative ,
some do not prefer to visit doctor ,take capsule evening primrose oil daily orally or & capsule evion 400 daily,
avoid hot water bath for long hours,
avoid dry soap,
may be fungal or just dry skin.
doctor would rule out rare disease -
fibrocystic breast disease,
pagest;s disease of nipple ,carcinoma ,
take care.