The swollen lymph nodes and abscesses are often referred to as buboes. Complications
Extensive lymph node inflammation may develop. Large inguinal abscesses may develop and rupture to form draining sinus or giant ulcer. Superinfection by Fusarium and Bacteroides. These later require debridement and may result in disfiguring scars. Phimosis can develop in long-standing lesion by scarring and thickening of foreskin, which may subsequently require circumcision. Sites For Chancroid Lesions
Males
Internal and external surface of prepuce. Coronal sulcus
Frenulum
Shaft of penis
Prepucial orifice
Urethral meatus
Glans penis
Perineum area

Females
Labia majora is most common site. "Kissing ulcers" may develop. These are ulcers that occur on opposing surfaces of the labia. Labia minora
Fourchette
Vestibule
Clitoris
Perineal area
Inner thighs

Causes
Chancroid is a bacterial infection caused by the fastidious Gram-negative streptobacillus Haemophilus ducreyi. This pathogen is highly infectious. It is a disease found primarily in developing countries, most prevalent in low socioeconomic groups, associated with commercial sex workers.Chancroid, caused by H. ducreyi has infrequently been associated with cases of Genital Ulcer Disease in the US but has been isolated in up to 10% of genital ulcers diagnosed from STD clinics in Memphis and Chicago.Infection levels are very low in the Western world, typically around one case per two million of the population (Canada, France, Australia, UK and US).
Chancroid ( SHANG-kroyd) is a bacterial sexually transmitted infection characterized by painful sores on the genitalia. Chancroid is known to spread from one individual to another solely through sexual contact. However, there have been reports of accidental infection through another route which is by the hand. While uncommon in the western world, it is the most common cause of genital ulceration worldwide. Signs and symptoms
These are only local and no systemic manifestations are present. The ulcer characteristically:

Ranges in size dramatically from 3 to 50 mm (1/8 inch to 2 inches) across
Is painful
Has sharply defined, undermined borders
Has irregular or ragged borders, described as saucer-shaped. Has a base that is covered with a gray or yellowish-gray material
Has a base that bleeds easily if traumatized or scraped
Painful swollen lymph nodes occur in 30–60% of patients. Dysuria (pain with urination) and dyspareunia (pain with intercourse) in femalesAbout half of infected men have only a single ulcer. Women frequently have four or more ulcers, with fewer symptoms. The ulcers are typically confined to the genital region most of the time. The initial ulcer may be mistaken as a "hard" chancre, the typical sore of primary syphilis, as opposed to the "soft chancre" of chancroid.Approximately one-third of the infected individuals will develop enlargements of the inguinal lymph nodes, the nodes located in the fold between the leg and the lower abdomen.Half of those who develop swelling of the inguinal lymph nodes will progress to a point where the nodes rupture through the skin, producing draining abscesses.