The syphilis rash is characterized by a coppery-red, infiltrative maculopapular or maculopapular rash on the palmar and plantar areas, with localized pustule formation seen in a few patients.
The syphilis rash is usually a sign of stage 2 syphilis and is caused by the spread of syphilis spirochetes from the localized chancre into the bloodstream and then into the microscopic capillaries of the skin. Typical lesions are copper-red, infiltrative macules or maculopapules on the palms and metatarsals, which can be categorized into maculopapular syphilis rash, papulopapular syphilis rash and pustular syphilis rash.
1. The maculopapular syphilis rash is mainly manifested as rosy or brownish-red round or oval rash, which is discolored by pressure and does not merge with each other, preferably on the trunk and proximal limbs, and the patients often do not have itching and other symptoms.
2. Papular syphilis rash often occurs after the patchy syphilis rash, and is usually found on the scrotum, labia majora and minora, anus, both sides of the trunk, abdomen, limb flexion, groin, etc. The papules are round and slightly elevated. The papules are round, slightly elevated, red to crimson, 2-5mm in diameter or larger, with infiltration to the touch, and mostly without conscious symptoms.
3. Pustular syphilis rash is relatively rare, occurring in the trunk, limbs and face of the weak and poorly nourished, for the inflammatory erythema on the base of the pustules, drying, crusting or the formation of non-healing ulcers. The pustules vary greatly in size and shape, and can be pustule-like, acne-like, or pimple-like.
If you suspect syphilis infection, you should go to a regular hospital in time for examination and treatment under the guidance of a doctor.