You may experience the following things after undergoing the breast enlargement surgery. The list is long but don’t let it discourage you. Tightness or pressure in the chest, feeling engorgement, stiffness in the morning, sore creases, post-op depression, vomiting, constipation, loss of appetite, yeast infection, fluid retention, muscle spasms, back pain, itching and dry skin, limited mobility and lack of energy.