Nipple pain could be due to rough sex if you are sexually active, ill fitting bra, jogging without bra, eczema, contact dermatitis, Paget’s disease of the breast
, bacterial or fungal infection. If there is breast
soreness then it could also be due to fibroadenosis or even an abscess.
Please consult your PCP or gynecologist for primary examination followed by proper referral or treatment. Hope this helps. Take care!