Breast cyst is warm to the touch, red, very painful, growing, red circle around it. even my shirt touching it hurts. what to do?

See doctor: Over the Internet it is not possible to determine if these symptoms are simply due to inflammation or if there is an infection. A visit to the doctor is needed for an accurate diagnosis and appropriate treatment.

Need to be checked: Due to the possibility of infection, you need to see a health care provider, preferably a breast care specialist as soon as possible. An ultrasound study will be very helpful and if needed an aspiration or other intervention may have to be considered.