Hi, i have a small pimple like lump on my left breast below the skin. it's kinda red and there is no fluid in there. is it cancerous? i'm worried.

Very unlikely: Women often times get sebaceous cysts under the skin of the breast. They are usually more common on the underside of the breast where your bra rubs the skin. Sometimes you do need an antibiotic ointment for these. However, there are other types of lumps you can have at your age like accessory nipples and breast cysts, so if it persists see your physician for an exam.

See a primary doctor: It could be red because you worry and palpate it often. How big this lump, how superficial? Your primary doctor should evaluate lesion and decide do you need any invasive procedures: fine needle aspiration or biopsy, or it is pimple-skin acne?. If it is breast lump, could be benign fibroadenoma or fibrocystic changes ( even no cysts and no fluid). Thank you for question.

Pimple or lump: A pimple is like 1 u may develop anywhere, red, often white center itchy or sore and involves superficial skin layers. A lump 2 worry about is pain free, well below the skin not red. If really worried, c ur gyn 2 b sure or a dermatologist.