It initially appears as a little pimple or blister 1 to 3 weeks after infection, and usually goes unnoticed at first. Two to 3 weeks after the appearance of the initial lesion, the lymph glands on one side of the groin become swollen and tender and the skin becomes tight and bluish red. The swelling may fester. Antibiotics are the usual treatment, and a doctor may also aspirate the inflamed gland. Another rare, parasite-related condition is granuloma inguinale, in which painless but malodorous ulcers form in the groin area, possibly accompanied by movable masses under the skin.
Treatment is similar to that for lymphogranuloma venereum.
These uncomfortable infestations are due to a tiny insect called the pediculus humanus. The first noticeable sign that lice are living on your skin or hair is usually an uncomfortable itch. They are extremely itchy, and are sometimes accompanied by hives, generalized itching, impetigo, or boils. Body lice can rarely be found on the body, but they may be located in the seams of clothing or in bedding folds. On the body there may be scratch marks, hives, eczematous changes, and red pimples, especially on the back.