I have a red dot on my right breast it hurts sometimes I squzzed ot and it popped and blood and puss came out is it just a pimple?

Skin infections. Pus filled bumps on the skin are usually the symptom of a skin infection. When they become red, warm to touch and painful it is called cellulitis. Treatment of this includes oral antibiotics and occassionally drainage. See your doctor, because resistant infections are becoming more common and require special treatment.