Haciendo que las típicas pápulas eritematosas, que aparecen al principio, se transformen en pustulosas y/o descarguen fluido serosanguinolento luego. [ecured.cu]

At return to Chile they presented with painful erythematous swollen skin papules along their dorsum and thighs. The diagnosis of foruncular myiasis was made after identifying larvae of Dermatobia hominis by morphology. [scielo.cl]