[Solved]: A 34 year old lactating mother presents with left…

A 34 year old lactating mother presents with left breast pain that started yesterday. The pain is achy to sharp at times ( 7/10 pain scale) and located on outside aspect of breast. She is afebrile and otherwise feels well. She is breast feeding her 4 month old daughter and returned to work 1 week ago. She nurses when at home and pumps every 4 hours at work. On exam you note firmness and tenderness on the left lateral breast between 1 and 3 o’clock. No erythema. What is your diagnosis?