You seem to have a breast abscess
. You need to take an antibiotic and a pain-killer tablet. You may do hot fomentation too with a cloth heated on a tava.
You are 81 kg and 155 cm with BMI of nearly 30. Ideally your BMI should be below 25 and a target weight of 60 kg. Because of obesity you are prone to diabetes
. So get your blood sugar checked for both fasting and two hours after.