erythema perstans

er·y·the·ma per·stans

probably a chronic form of erythema multiforme in which the relapses recur so persistently that the eruption is almost permanent.

erythema perstans

a persistent local redness of the skin, characteristically annular.

er·y·the·ma per·stans

(ĕ-rith'ĕ-ma pĕr'stanz)
Probably a chronic form of erythema multiforme in which the relapses recur so persistently that the eruption is almost permanent.