Chancroid is sexually transmitted disease caused by a bacillus. Haemophilus ducreyi and characterized by genital ulcer with or without inguinal swelling. The disease is common in lower socioeconomic strata. It is uncommon in women and circumscribed males. Genial ulcer: initial lesion is a papule or vesicle which is ruptures soon to give rise to ulcer. Inguinal swelling: lymph nodes are enlarged painful, tender and matted together. Variant of chancroid ulcer: 1. Follicular chancroid, 2. Dwarf chancroid, 3. Transient chancroid, 4. Giant chancroid, and 5. Phagedenic ulcer. Diagnosis: Direct smear the organism can be demonstrated in one third of cases in the smear taken from ulcer and stained with gram stain. Treatment (local): 1. Cleaning of genital ulcer with normal saline. 2. If there is preputial oedema, hypertonic saline is used for dressing. 3. If phimosis develops, subpreputial irrigation with saline. 4. Inguinal bubo should never be incised. Systemic treatment: 1. Sulphonamides. Cotrimoxazole containing 400 mg of sulfamethoxazole. 2 tablets twice daily for 10 days. 2. Streptomycin in doses of 1 gm. IM daily 7 or 14 days. 3. Tetracycline 500 mg orally 6 hourly for 10 to 14 days are given. 4. Streptomycin in doses of 1 gm IM daily for 7 to 14 days. 5. Tetracycline 500 mg orally 6 hourly for 10 to 14 days are given.