groin itching
Introduction
Introduction The itch of the groin is mostly caused by femoral hernia. The femoral hernia is a skin disease caused by infection of the fungus on the medial side, perineum, and buttocks. Since the thigh is more suitable for fungal growth, the incidence of femoral hernia is relatively high. In addition, the skin of this part is thin and tender, and Trichophyton rubrum and Trichophyton mentagrophytes are suitable for thigh growth. Airtight clothing increases the temperature and humidity of the skin and interferes with the barrier function of the stratum corneum. Trichophyton rubrum and Trichophyton mentagrophyta enter the skin and go through several stages of development, including incubation, growth and degeneration during the anti-infective process.
Cause
Cause
(1) Causes of the disease
The main pathogens of the femoral hernia are Trichophyton rubrum and Trichophyton mentagrophytes. Flocculous epidermis has been a common pathogen of femoral hernia in the past, but it has been less in recent years. Other pathogens that can cause body lice can also become the cause of femoral hernia, but the proportion is small. Chinese medicine believes that sweating for a long time, caused by external wind and evil.
(two) pathogenesis
The incubation period is in the stratum corneum and the clinical manifestations are mild. Once the infection is established, the growth rate of T. rubrum and T. rubrum and the rate of epidermal renewal are two key factors for the development of damage. The former must be equal or the former is greater than the latter, otherwise the number of Trichophyton and Trichophyton rubrum will decrease. The keratinase and other proteolytic enzymes produced by Trichophyton rubrum and Trichophyton mentagrote not only colonize and invade the skin, but also manifest as skin damage.
Examine
an examination
Related inspection
Skin smear microscopy skin microscopy
symptom:
The main symptom is local itching.
The disease is prone to recurrence, mostly due to contact with patients with sputum or through cats, dogs, etc., or indirect infection through clothing, or first suffering from ankles, due to spread and spread. In the summer season, the climate is hot and humid, and the human body is sweaty, especially in the stock. If you don't take a shower in time, or wear a lot of sweat in your tight underwear, you can easily get the disease. In addition, patients with diabetes, excessive vaginal discharge, and long-term oral or topical application of a large number of broad-spectrum antibiotics or corticosteroids are also susceptible to femoral hernia. In terms of incidence, mainly young people, more men than women.
The femoral hernia is a skin disease that occurs in the thigh. Sometimes it can also affect the perineum, pubic lice, perianal, buttocks, scrotum folds, etc. Itching is severe. Due to scratching, the patient may have secondary dermatitis and lichenification. Or secondary infection.
feature:
(1) At the beginning of the femoral hernia, the erythema with clear edges and slightly bulging gradually expands, and there is debris on it, gradually turning from red to brown or skin tone.
(2) The center of the lesion gradually heals automatically and develops to the surrounding area. The inflammation of the edge of the erythema is more obvious. There may be rashes, blisters, suede, and even erosion, forming a ring shape.
(3) The temporary pigmentation is left behind and the symptoms of itching are severe.
At the beginning of the femoral hernia, flushing and small papules appeared on the inner side of the femoral sac near the scrotum, and then a small piece of white scales formed on the top of the papule, and the rash gradually spread to the periphery with clear boundaries. During the onset, pimples, blisters and scales can occur at the same time, occasionally pustules. The individual conscious itch is very different. When it is severe, it is unbearable and it is not itch. It is often found to be mossy with pigmentation. Skin lesions can also be extended to the lower abdomen, perineum and buttocks. The scrotum and penis skin may also be involved.
The condition is closely related to the season. The disease usually occurs in the summer. The humid or hot climate often makes the condition worse, and it is easy to spread and the itch is obvious. It can be naturally relieved in winter, stable or cured. If the disease is not treated in time, it can be delayed for a long time.
Diagnosis
Differential diagnosis
diagnosis:
The diagnosis of typical femoral hernia is not difficult, mainly based on the symmetrical or unilateral nucleus of the genital tract, clear boundary inflammatory lesions, disseminated papules, blisters, scales on the edges, direct scaling of scaly and blisters The fungus can be detected, and the positive rate of microscopic examination is very high.
Differential diagnosis of inguinal itch:
1, anal itching: anal pruritus (peritus ani, PA) is a common local pruritus. Sometimes the anus is slightly itchy, such as severe itching, and it becomes pruritus when it is not cured for a long time. It is a common localized neurological dysfunction skin disease. Usually only around the anus, and some can spread to the perineum, vulva or scrotum. It occurs mostly at noon and old age between 20 and 40 years old, and young people under the age of 20 are few and rarely occur in children. Men are more common than women, and people who are used to quiet and infrequent exercise often suffer from this pruritus. Secondary pruritus has obvious pathogenic causes and is easy to treat; spontaneous or unexplained PA is not easy to cure, and often relapses, accounting for about 50% of all patients.
2, urethral itching: gonococcal urethritis (acute gonorrhea): the incubation period is 1-14 days, often 2-5 days. From the beginning, it is acute anterior urethritis, redness, itching and slight tingling of the urethra, followed by thin mucus effluent, causing urination discomfort.
3, scrotum itching: scrotal itching is generally caused by scrotal eczema, allergic dermatitis, hemorrhoids and so on. Scrotal itching is a very common manifestation, especially for young men.
4, anal eczema itching: anal eczema itching is a type of secondary itching. Secondary pruritus is caused by primary diseases and various skin diseases, with obvious specific skin lesions and primary lesions. Itching is often a symptom of primary lesions. Such as anal fistula, anal eczema, genital warts, neurodermatitis, anorectal tumors, aphids and other anal itching are such.
