Breast pressure pain but no lump, there are many possible reasons: 1, breast trauma, chest was hit or squeezed resulting in injury to the breast tissue, will show pain, the appearance of no wounds can be massaged, acupuncture or plastered ointment, there is a need to stop the bleeding of wounds, to prevent infection. 2, endocrine imbalance, the rise of estrogen in the body before the physiological period and physiological period of the breast pressure pain, swelling, breast heat feeling, obvious pain can take medication. The feeling of obvious pain can take medication, the symptoms are more serious can take daily Chinese medicine to regulate. 3, heart problems, the left side of the inner breast if there is pressure pain, need to be highly alert to heart problems, sinus rhythm or angina pectoris may have this manifestation, you can carry out cardiac ultrasound examination after the relevant treatment. 4, underwear is too tight, the constraints of the underwear will make the breasts of the blood does not flow smoothly to produce swelling, The underwear is too tight, the binding underwear will make the breast blood does not flow smoothly to produce swelling, pressure and pain, need to replace the new underwear.