Rib healing: No real good studies on rib fractures. They can hurt for weeks or longer depending on how bad the fractures are. Usually walking around is good.
Subcutaneous tissue. The subcutaneous tissue, also called the subcutis, hypodermis, hypoderm, subcutis, or superficial fascia, is the lowermost layer of the integumentary system in vertebrates.
Subcutaneous. 1  Drugs which are irritating or those in very viscous (thick) suspensions may produce induration, sloughing, or abscess formation and may be painful to the patient. 2  Irritating drugs and vasoconstrictors can lead to abscesses or necrosis. 3  If frequent injections are required, the injection sites must be rotated. One of the most obvious ways to achieve very long term drug release is to place the drug in a delivery system or device that can be implanted into a body tissue. The subcutaneous tissue is the ideal site for implantation of such devices.