Exacerbation of existing skin lesions is characteristic of
Type 1 leropsy reaction is characterised by exacerbation of preexisting lesions.there will be erythema , odema, tenderness over the previous leprosy patches. Sometimes lesions may ulcerate in severe type 1 reaction iadvl textbook of dermatology page 2046
Lucio reaction
Erythema nodosum leprosum
Type 1 lepra reaction
Jarisch hexhiemer reaction
Bacterial infections