hi. based on your description (raised swollen lump, with a small dark dot in the middle which is the punctum), it could be a cystic formation (sebaceous or keratinous type). other breast lesions (such as abscess formation, fibromas, fibrocystic changes) must also be ruled-out. it is best if you see a doctor, preferably a general surgeon, for physical examination and clinical evaluation. diagnostics such as breast ultrasound and mammography, may be recommended as needed. management (medical and/or surgical if indications are found) will be directed accordingly. hope this helps. good day!! ~dr.kaye