Skin GVHD: the rash, its grade and its treatment | CION Cancer Clinics

Skin GVHD usually starts as a red, sometimes itchy rash on the palms, soles, ears, face or shoulders after a donor stem cell transplant. Mild rashes are often treated with steroid creams, while a rash covering a large area is usually treated with steroid medicines by mouth or drip. Any new rash after a donor transplant should be shown to your transplant team.

Why the skin is so often affected first

The skin is full of the kind of cells the donor immune system recognises as different. It also renews itself quickly. That is why a rash is often the earliest visible sign of GVHD, sometimes around the time the new blood counts begin to recover.

How the acute and chronic rashes differ

The acute rash is red and inflamed, a bit like measles or sunburn. It can feel hot, burn or itch. Chronic skin GVHD looks different. The skin may become dry and scaly, blotchy darker or lighter, shiny and thin, or thick and tight like leather. Tight skin over a joint can stop it moving fully.

Why a rash is not always GVHD

After a transplant, rashes also come from antibiotics and other medicines, from viruses, and from the conditioning treatment given before the transplant. These can look almost the same. The team often needs to see the rash in person, and sometimes takes a small skin biopsy, a tiny sample read under a microscope, to be sure.

This page cannot tell you whether your rash is GVHD. A photo or a description is not enough, even for a specialist. The transplant team needs to see it, check your medicines and look at your blood tests.

Who stronger treatment does not suit

Steroid medicines through the whole body are harder for people with an active infection, diabetes that is difficult to control, thinning bones or mood problems. They are still often needed, but the team will watch more closely or choose another route.

How long it takes to settle

Acute skin GVHD often improves within days to weeks of starting treatment. Chronic skin changes, especially tight skin, improve much more slowly, and some changes may not fully reverse. Ask your team what progress they are looking for, and by when.