In short. Where split-thickness and full-thickness skin graft donor sites are taken from, how each type heals, and the permanent scar it leaves behind.
Key points
- This is the trade-off that patients most often underestimate.
- A split-thickness donor site heals like a large graze: it weeps for one to two weeks under a dressing, then re-covers itself, and it leaves a permanent patch that is often darker or lighter than the surrounding skin, sometimes with a mottled texture.
- A full-thickness donor site leaves a surgical line.
Every skin graft creates a second wound. The place skin is taken from is called the donor site, and patients often find it more uncomfortable in the first two weeks than the graft itself. Being clear about where the skin comes from, how that area heals, and what scar it leaves is part of consenting honestly to a graft.
Where split-thickness grafts come from
Thin grafts are usually harvested from areas that are easy to hide and quick to heal. The outer thigh is the most common, followed by the buttock, the upper arm, and sometimes the scalp. These areas have a dense enough blood supply to re-cover themselves, and a dermatome can take a broad, even sheet. The scalp is favoured in some units because it heals quickly, but it is only suitable for thin grafts.
Where full-thickness grafts come from
A full-thickness graft takes the whole thickness of skin, so the donor area has to be closed with sutures like any other excision. Surgeons therefore choose sites where the skin is loose enough to close and where the resulting line can be hidden: the groin crease, the lower abdomen, the inner upper arm, the front of the ear, the nasolabial fold, or the neck behind the ear. Skin from behind the ear and small cartilage grafts are common when a colour-matched patch is needed for the face.
The donor site leaves its own permanent scar
This is the trade-off that patients most often underestimate. A split-thickness donor site heals like a large graze: it weeps for one to two weeks under a dressing, then re-covers itself, and it leaves a permanent patch that is often darker or lighter than the surrounding skin, sometimes with a mottled texture. A full-thickness donor site leaves a surgical line. Either way the donor scar is permanent, and it becomes a second area that must be cared for, protected from the sun, and sometimes treated with silicone or laser later.
How donor sites heal
Split-thickness donor sites heal by migration of skin cells from the wound edges and from the hair follicles and glands left behind. Healing therefore takes roughly ten to twenty-one days, depending on the depth taken and on the patient. The area is initially red or pink and can itch intensely. Pressure, silicone sheeting and early scar management reduce thickening. Full-thickness donor sites heal by primary intention in about one to two weeks, and the scar matures over the usual twelve to eighteen months.
Pain, and the honest limits
Donor sites are genuinely painful for the first week to ten days, and pain control should be discussed beforehand rather than improvised afterwards. There is a small risk of infection, delayed healing, or thickened scarring at the donor site, and in darker skin types the colour difference can be conspicuous. None of this is a reason to avoid a graft when one is needed, but it is a reason to decide with the full picture in front of you.
Contact the team urgently if
- A donor site becomes increasingly painful, or the surrounding skin spreads red and warm.
- There is a foul smell, pus, or fluid that soaks through dressings faster than expected.
- Healing stalls beyond three weeks, or the donor area bleeds heavily or opens up again.
Frequently asked questions
Where is skin taken from for a graft?
Thin grafts usually come from the outer thigh, the buttock, the upper arm or sometimes the scalp. Full-thickness grafts come from sites loose enough to close and easy to hide: the groin crease, the lower abdomen, the inner upper arm, in front of the ear, or the neck behind the ear.
What does the donor site leave behind?
A permanent scar. A split-thickness donor site heals like a large graze, weeping for one to two weeks, then re-covering itself and leaving a patch often darker or lighter than surrounding skin. A full-thickness donor site leaves a surgical line. Either way it needs care and sun protection.
How painful is a donor site?
Genuinely painful for the first week to ten days, and often more uncomfortable than the graft itself in the first fortnight. Pain control should be discussed beforehand rather than improvised afterwards. There is also a small risk of infection, delayed healing or thickened scarring at the donor site.
Risks & Limitations
- Partial or complete failure of a graft or flap, which may need further surgery.
- Donor-site scarring, delayed healing and pain. A donor site leaves its own permanent scar.
- Infection, bleeding under a graft, or fluid collecting beneath a graft or flap.
- Contracture, and recurrence of contracture after a release procedure.
- Reconstruction is usually staged: more than one operation and months of healing are normal.
- Colour, texture and contour mismatch between reconstructed skin and the surrounding area.
- Reduced or altered sensation in grafts, flaps and donor sites.
- Scars are permanent. They mature and fade but never disappear.
- Final assessment is made at 6–12 months, and longer in growing children.
When to Seek Care
- A graft or flap that turns dark, cold, dusky, purple or black, or stops bleeding when pricked.
- A dressing soaked with blood, or bleeding that does not stop with gentle pressure.
- Fever above 38 °C, or spreading redness, warmth or discharge around a wound.
- New or severe pain, or rapid swelling under a graft or flap in the first days.
- A limb that becomes pale, cold or numb after flap surgery.
- Any change in a grafted or flap-covered area that concerns you, however minor.
References & Further Reading
- American Society of Plastic Surgeons (ASPS) — reconstructive surgery and skin graft guidance
- Cochrane Library — systematic reviews in wound care and surgical reconstruction
- Wounds International — wound bed preparation and graft survival guidance
- Chinese Medical Association, Plastic Surgery Branch — clinical guidance
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.