Thanks for posting your query.
The bump on the areola
has appeared acutely so it can not be a cancer or a second nipple because the two problems are long standing.
The Suddenly appearing painful swelling in nipple in your case may be a result of muscle pull, a hematoma
or an infection of breast secretory glands if you had synthetic supports and had swelling in the area.
The problem should be evaluated by a local physician because delaying may make the treatment difficult.
Hope I have answered your query.
If you have any questions I will be happy to answer.
Wish you a good health.