In short. A raised, red, itchy scar is expected in the first months. The question is whether it is settling or growing, and how a hypertrophic scar is treated.
Key points
- Two identical incisions on two different parts of the body do not produce the same scar.
- Sites under continuous tension, and sites that move, are more prone to hypertrophic scarring.
- That is a property of the site rather than a verdict on the operation, and it informs both the prognosis and the plan.
Almost every scar is raised, red and itchy at some stage, and that stage is expected. The clinical question is not whether a scar is raised today but whether it is following the normal course — peaking and then settling — or continuing to thicken when it should be flattening. That distinction is what separates ordinary maturation from a hypertrophic scar, and it is made over time rather than from a single examination.
What normal maturation does
A scar becomes raised and firm as new tissue is laid down, reaches its most conspicuous point somewhere in the first two months, and then gradually flattens, softens and pales over the following year. Itch and tenderness ease with it. The change is slow, which is why it is judged from photographs taken months apart rather than from how the scar feels this week.
What a hypertrophic scar does
A hypertrophic scar does the same thing but does not stop. It remains raised, it may continue to thicken, and it stays red and itchy well beyond the point at which it should have begun to settle. It remains within the boundary of the original wound, which is what distinguishes it from a keloid. It is common on sites under tension, such as the chest, the shoulder and over joints, and it is more likely after a wound that became infected or that healed slowly.
The site and the tension matter as much as the surgery
Two identical incisions on two different parts of the body do not produce the same scar. Sites under continuous tension, and sites that move, are more prone to hypertrophic scarring. That is a property of the site rather than a verdict on the operation, and it informs both the prognosis and the plan.
How it is treated
Treatment is offered for a scar that is failing to settle, that causes significant pain or itch, or that restricts movement. Options are chosen by stage and by site: pressure and silicone-based approaches, injections that modify the scar's activity, and treatments that address the blood vessels and the tissue within the scar. Surgery is not the first choice for a hypertrophic scar, because it creates a new wound in a person whose healing has already produced one, and the new scar may behave the same way.
What to expect from treatment
Improvement rather than removal. A treated hypertrophic scar is usually flatter, softer, paler and less troublesome than it was, and it may still be visible. Treatment is often staged over months rather than completed in one session, and the response is judged over that period. A clinician who promises that the scar will disappear is promising something no treatment delivers.
Seek care rather than waiting if
- The scar keeps growing beyond the boundary of the original wound rather than staying within it.
- The scar becomes increasingly painful or itchy months after it had healed.
- The wound becomes red, hot, swollen or discharges pus, or you develop a fever — contact your treating team now.
Frequently asked questions
Is a raised red scar always abnormal?
No. Raising, redness and itch are expected in the first months of maturation, and the phase that looks worst is often around six weeks. What distinguishes a hypertrophic scar is that it stays raised or keeps thickening beyond the time it should have begun to settle.
Will a hypertrophic scar go away on its own?
Many hypertrophic scars improve considerably over a year or more, though the change is slow and may not be complete. Treatment is offered for a scar that is failing to settle, is causing significant pain or itch, or that is restricting movement, rather than for every raised scar.
Does a hypertrophic scar mean the operation was done badly?
Not necessarily. Scar behaviour depends on the site, the tension on the wound, the person's own healing response and whether the wound became infected. A hypertrophic scar is a variation in healing rather than evidence of a technical failure.
Risks & Limitations
- Every operation leaves a scar. A scar is a normal result of healing, not a complication.
- A scar continues to change for twelve months or more, so its early appearance is not its final appearance.
- Hypertrophic scarring and keloid, in which a scar becomes raised, thickened, itchy or continues to grow.
- Infection, wound breakdown or a collection under the wound, any of which changes how a scar forms.
- Scar contracture, where a scar tightens and restricts movement or distorts a nearby structure.
- No treatment removes a scar. Treatment can change its width, height, colour, texture or tightness.
- Further surgery produces a new scar, which may heal better or worse than the one it replaced.
When to Seek Care
- Increasing pain, spreading redness, heat, swelling, pus or a fever from a wound — contact your treating team now, and if the team cannot be reached go to the nearest emergency department.
- A wound that opens, gapes or discharges fluid.
- A scar that keeps growing beyond the original wound, or that becomes painful or itchy months after healing.
- A scar that tightens and restricts movement, or that distorts a nearby feature.
- Breathlessness, chest pain or a swollen painful calf — seek emergency care immediately.
References & Further Reading
- American Academy of Dermatology (AAD) — scar and wound care information
- American Society of Plastic Surgeons (ASPS) — scar revision guidance
- National Health Commission of the People’s Republic of China — surgical site infection prevention
- Chongqing West District Hospital — Plastic Surgery & Aesthetics Medical Center
This page is patient education, not medical advice, and it does not cite individual studies. Discuss your own case with a qualified clinician. To arrange an assessment at Chongqing West District Hospital, see Contact & Consultation.