Soft-Tissue Inflammation and Scarring
Introduction
Soft-tissue inflammation and soft-tissue scarring are different but closely related parts of the body’s response to injury. Inflammation is the body’s initial response to tissue damage. It brings increased blood flow, immune cells, and chemical signals to the injured area and begins the healing process. As healing progresses, the body produces new collagen and other tissue to repair the damaged area. The final result of this repair process is scar tissue, also called fibrosis. Some scarring is a normal and necessary part of healing. Problems develop when inflammation lasts longer than expected or when excessive or poorly organized scar tissue interferes with normal movement. Depending on the location and severity, inflammation and scarring can cause pain, swelling, stiffness, tenderness, weakness, restricted motion, or a feeling that tissues are tight or “stuck.” Scar tissue around a nerve can also contribute to burning, tingling, numbness, or electrical pain.
Soft-Tissue Inflammation
Soft-tissue inflammation can develop after an acute injury, such as a muscle strain, ligament sprain, tendon injury, or surgery. It can also result from repeated stress that gradually overloads a tissue. Muscles, tendons, ligaments, joint capsules, bursae, fascia, nerves, and other connective tissues can all be affected. Normal inflammation begins soon after an injury and is usually most noticeable during the first several days. The initial inflammatory phase commonly lasts several days to about a week, although some inflammatory activity continues as the tissue enters later stages of healing. Symptoms of inflammation should generally decrease as healing progresses. Inflammation becomes more concerning when it is excessive, continues much longer than expected, repeatedly returns, or occurs without a clear healing purpose. Persistent soft-inflammation can result from continued mechanical irritation, repeated injury, infection, inflammatory disease, a foreign-body reaction, or another underlying problem.
How Doctors Diagnose Soft-Tissue Inflammation
A doctor usually diagnoses soft-tissue inflammation by combining the patient’s history with a physical examination. The doctor will ask when the symptoms began, whether there was an injury, what activities make the symptoms worse, and whether the problem is improving or worsening. Examination may identify swelling, warmth, tenderness, pain with movement, or reduced function. The doctor may also test individual muscles, tendons, ligaments, joints, and nerves to determine which structure is responsible.
X-rays do not show most soft tissues well but can identify arthritis, fractures, or other bone abnormalities that may be contributing to the problem. Ultrasound or MRI may be helpful when the diagnosis is unclear or a significant tendon, muscle, ligament, or other soft-tissue injury is suspected. Blood tests are occasionally needed when infection or a chronic systemic inflammatory disease is a concern.
Treatment of Soft-Tissue Inflammation
Treatment of normal post-injury inflammation should support healing rather than attempt to eliminate inflammation completely, because inflammation is an important part of tissue repair. Early treatment often includes protecting the injured area, temporarily reducing activities that increase symptoms, and using ice or compression when helpful for pain and swelling. As symptoms improve, movement and loading are gradually restored. Physical therapy may be used to regain motion, strength, and normal function. Acetaminophen or anti-inflammatory medications may help control pain in appropriate patients, although NSAIDs should be used thoughtfully because inflammation itself has a role in healing. When inflammation is unusually severe or persistent, treatment should focus on identifying and correcting the underlying cause. This might include changing repetitive activities, correcting a mechanical source of irritation, treating an infection or inflammatory disease, or addressing another structural problem. In selected conditions, a corticosteroid injection may reduce excessive inflammation, but injections are not appropriate for every tissue or condition and may weaken certain tissues if used improperly.
Soft-Tissue Scarring (Fibrosis)
As inflammation settles, the body moves into the repair and remodeling phases of healing. Cells called fibroblasts produce collagen that helps reconnect and strengthen the injured tissue. This newly formed tissue eventually becomes part of the scar, or fibrosis, left behind by the injury. Scar formation is normal and necessary, but scar tissue is not identical to the original tissue. Early scar tissue can be thick, stiff, and poorly organized. Over time, collagen fibers remodel in response to movement and mechanical loading, and the scar usually becomes stronger and more flexible. Excessive fibrosis can bind tissues together, restrict normal tissue gliding, or shorten structures around a joint. This may produce stiffness, restricted motion, pain with stretching or movement, weakness, or a pulling sensation. Scar tissue involving or surrounding a peripheral nerve can restrict normal nerve movement or contribute to nerve compression, potentially producing pain, burning, tingling, numbness, or weakness.
How Doctors Diagnose Soft-Tissue Scarring (Fibrosis)
A doctor diagnoses symptomatic soft-tissue scarring by first determining whether the patient’s symptoms match the location and function of the scarred tissue. Previous surgery, trauma, infection, prolonged immobilization, or a significant soft-tissue injury provides an important clue. Examination may reveal a thickened or firm area, reduced skin or tissue mobility, loss of joint motion, a contracture, or pain when the affected tissue is stretched or loaded. A surgical scar may sometimes be visibly tethered to deeper tissues. When a nerve is involved, the examination may include testing strength and sensation and looking for signs of nerve irritation. Ultrasound or MRI can sometimes demonstrate thickened or scarred tissues and show how they relate to nearby tendons, muscles, or nerves. However, scar tissue is extremely common after injury and surgery, so simply seeing fibrosis on an imaging study does not prove that it is causing the patient’s symptoms. The clinical examination and the relationship between the scar and the patient’s problem are particularly important.
Treatment of Soft-Tissue Scarring (Fibrosis)
Treatment of symptomatic soft-tissue scarring usually begins with progressively restoring movement and normal loading of the affected tissues. Physical therapy or occupational therapy may include stretching, strengthening, joint mobilization, scar mobilization, and exercises designed to restore normal movement between tissue layers. When a nerve is involved, carefully performed nerve-gliding exercises may help improve nerve movement without aggressively stretching it. Treatment is usually gradual because forceful stretching of an irritable or recently healed tissue can cause additional injury and inflammation. Most scars continue to remodel for many months, and symptoms often improve as the tissue becomes more flexible. When dense scar tissue produces a significant contracture, persistent tendon restriction, or nerve compression that does not improve with conservative treatment, surgery may occasionally be considered. Depending on the problem, surgery may involve releasing a contracture, removing adhesions, freeing a tendon, or performing neurolysis to release a nerve from surrounding scar tissue. Rehabilitation after surgery is important because scar tissue can form again.
Summary
In summary, inflammation and scarring are normal parts of the body’s healing process. Inflammation occurs first and helps the body respond to an injury. As healing continues, the damaged area is repaired with new tissue that eventually forms a scar. Most inflammation gradually settles, and most scars become softer and more flexible with time. Problems can occur when inflammation continues for too long or becomes chronic –or when too much scar tissue develops. These problems can cause pain, swelling, stiffness, weakness, or difficulty moving. Scar tissue around a nerve can also cause burning, tingling, or numbness. Treatment usually focuses on finding the cause, allowing the tissue to heal, and gradually restoring normal movement and strength. Surgery is needed only in selected cases when abnormal scar tissue continues to interfere with normal function.
Edited by Stephen Pinney MD, October 2nd 2026.