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.
(See also healing and keloid.) Beneath the skin is a fibrous connective tissue known as subcutaneous tissue, composed of cells called fibroblasts, which after injury are stimulated to grow into granulation tissue, knitting the wound together. Scar tissue is formed by dense masses of granulation tissue.