Chancroid - Soft Chancre ( STD ) . Tender, non-indurated ( Bleed On Touch ) , single or multiple large ulcers with no lymphadenopathy, painful ulcers over inner or outer prepuce in males or labia in females caused by organisms H. ducreyi ( Gram Negative Bacillus ) . Differential Diagnosis Of Chancroid :- Genital Herpes Primary Syphilis Lymphogranuloma Venerum Donovanosis Fixed Drug Eruption Trauma Carcinoma ( Occasionally )