"Small pale brown spot on the breast"

Yes, freckles can appear suddenly for a variety of reasons. They can be caused by factors such as age, pregnancy, hormones, medications, sun exposure, or even minor skin trauma. Freckles are usually benign and do not pose any danger. Treatments for freckles are typically cosmetic in nature. If you have concerns about a sudden appearance of a freckle, it's best to consult with a healthcare professional for further evaluation and advice.