A red spot on right breast. 1/2cm. Its not painful, not itchy, no heat or swelling. Its not hard but small red lines coming from it, spot? Bite? Ibc?

See a dermatologist. It is difficult to make a proper diagnosis since I am not there to see the condition. I recommend seeing a dermatologist so that they can make a proper diagnosis and give you something to get rid of the condition or relieve symptoms.