Question: how to check if you have breast cancer?
Answer: A lump in your breast. A lump or mass in the breast is the most common symptom of breast cancer. ... 
Swelling in or around your breast, collarbone, or armpit. ... 
Skin thickening or redness. ... 
Breast warmth and itching. ... 
Nipple changes. ... 
Nipple discharge. ... 
Pain.