Follow the below steps to check your breasts for lumps:-
Stand in front of the mirror with your shoulders straight and your arms on your hips, looking at your breasts. Skin that is dimpling, puckering or bulging.
Raise your arms and look for the same changes as before.
Examine your nipples in the mirror for any symptoms of fluid leaking from one or both of them (this could be a watery, milky, or yellow fluid or blood).
Keep your fingers flat and together while applying a firm, smooth touch to the first few finger pads of your hand. Make a quarter-sized circular motion with your hands.
From your collarbone to the top of your abdomen, and from your armpit to your cleavage, cover the entire breast from top to bottom, side to side.