Public condition directory

Dermatology and Venereology

Browse public condition summaries from China medical resources by stable specialty category.

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Dermatology and VenereologyDermatology and Venereology

Laser wrinkle removal

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Dermatology and VenereologyDermatology and Venereology

Chilblains

Chilblains are a common skin condition that occurs in cold seasons (temperatures below 10 degrees Celsius). They are localized inflammatory skin lesions caused by cold, primarily affecting the extremities and exposed areas. The course of the disease is slow, lasting several months, often not healing until the following spring, and there is a high probability of recurrence in the next winter. For those who have had chilblains, if they recur in the following year, it is likely to be in the same location. This condition is common in children, young women, or individuals with poor peripheral circulation. The main symptoms include purplish-red patches, swelling, itching, and blistering of the skin. Itching intensifies with warmth. If ulcers or erosions occur, there may be pain.

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Dermatology and VenereologyDermatology and Venereology

Male genital organ infection

Male reproductive organs include both internal and external genitalia. Internal genitalia: testes, epididymis, urethra, vas deferens, spermatic cord, seminal vesicles, prostate, etc. External genitalia: penis and scrotum. Male reproductive organ infection is a type of inflammatory disease caused by pathogenic microorganisms invading the male reproductive organs. These diseases can generally be divided into three categories: non-specific infections, tuberculosis infections, and skin and sexually transmitted infections: Non-specific infections: mainly include urethritis, prostatitis, epididymitis, orchitis, funiculitis, vasitis, etc. Tuberculosis infections: mainly include urethral tuberculosis, epididymal tuberculosis, prostate and seminal vesicle tuberculosis, testicular tuberculosis, scrotal tuberculosis, penile tuberculosis, etc. Skin and sexually transmitted infections: mainly include gonorrhea, syphilis, condyloma acuminatum, genital chlamydia infection, genital herpes, AIDS, trichomoniasis, etc. Main symptoms include frequent urination, urgency, painful urination, and difficulty urinating.

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Dermatology and VenereologyDermatology and Venereology

Tinea cruris

Tinea cruris specifically refers to dermatophyte infections occurring in the groin, perineum, perianal area, and buttocks, and is a skin disease of a special site. Obesity with excessive sweating, diabetes, and chronic debilitating diseases are predisposing factors. It manifests as annular or semi-annular erythematous patches in the groin and buttocks, accompanied by itching.

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Dermatology and VenereologyDermatology and Venereology

Skin papilloma

Skin papilloma is a histopathological term, mainly including the following two types: Common warts: Caused by human papillomavirus infection, presenting as hard papules with a rough surface to the touch. They can occur on any part of the body, but are most common on the hands. Seborrheic keratosis: One of the most common benign epidermal tumors, mainly seen in adults over 40 years old. Its incidence increases with age, hence it is also known as senile warts or age spots. It can occur on any skin area except the palms and soles, but is most common on the trunk and head and neck. Typical manifestations are round or oval papules or plaques, light brown to black, with clear boundaries, appearing to be "stuck" on the skin surface, and varying degrees of keratinization (roughness) visible on the lesion surface.

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Dermatology and VenereologyDermatology and Venereology

Impetigo

Impetigo, also known as "infectious impetigo" or commonly "yellow sore," is an acute purulent skin disease caused by Staphylococcus aureus and/or beta-hemolytic streptococci. It is characterized by the formation of papules, vesicles, and pustules, which easily rupture and erode, forming honey-colored crusts. This disease is highly contagious and can spread in nurseries, kindergartens, and primary and secondary schools.

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Dermatology and VenereologyDermatology and Venereology

Pubic lice

Phthiriasis, also known as pubic lice infestation, is a contagious skin disease caused by pubic lice biting the skin. These lice parasitize the hair around the human external genitalia and anus, leading to itching. It is common for couples to be affected simultaneously. Pubic lice are different from head lice; they are another type of louse, measuring about 1-3 millimeters in length. Their bodies are flat, and under a magnifying glass, they resemble crabs, hence they are also called crab lice. Pubic lice typically live around the pubic hair and lay their eggs there. In some patients, pubic lice can also be found on eyebrows and armpit hair. Pubic lice feed on blood, and their bites on the genitals can cause severe itching, affecting the patient's normal life.

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Dermatology and VenereologyDermatology and Venereology

Granuloma inguinale

Granuloma inguinale is a chronic, granulomatous, and locally destructive sexually transmitted disease caused by infection with *Klebsiella granulomatis*. This disease is characterized by painless subcutaneous nodules with ulceration, primarily transmitted through sexual contact. 90% of cases occur in the genital area, and 10% occur in the groin and anus. The global prevalence of granuloma inguinale is decreasing year by year. It is rare in China, with only sporadic reports, and is mostly seen in sexually active individuals aged 20-40, primarily transmitted through sexual activity.

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Dermatology and VenereologyDermatology and Venereology

Bites and stings

Bites and stings are categorized into animal bites, snakebites, and insect stings. Animal bites are often inflicted by domestic animals such as dogs, cats, and pigs, or wild animals like rats and wolves. Dog bites are the most common. These animal bites leave wounds or marks and introduce pathogenic microorganisms, which can lead to secondary infections. A severe pathogen is the rabies virus, which can be introduced into human tissue through bites or scratches from rabid dogs, cats, or wolves. Snakes are divided into non-venomous and venomous. Non-venomous snakebites leave small tooth marks on the skin at the injury site, causing mild stinging pain, and sometimes small blisters may form. There are no systemic reactions, and generally no adverse consequences. Venomous snakebites leave a pair of deeper tooth marks at the injury site. Due to the venom entering the tissues and then the lymphatic system and bloodstream, severe poisoning can occur, requiring emergency treatment. Common insect stings include bee stings, scorpion stings, caterpillar stings, centipede bites, and leech bites.

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