How is it diagnosed?

Your GP may suspect bullous pemphigoid just by looking at your skin.

The diagnosis is then confirmed by taking a small sample of your affected skin (biopsy) and sending it to a laboratory to be inspected to see if the top layers of skin have separated.

Special staining (immunofluorescence) may be used to show up the antibodies, and a blood sample may be taken and checked for the presence of pemphigoid antibodies.

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Medically Reviewed by a doctor on 21 Dec 2018