Rash on the inside of the thigh near the scrotum

Introduction At the beginning of the femoral hernia, there is flushing and small papules on the inner side of the thigh, and then a small piece of white scales is formed on the top of the pimples. The rash gradually spreads to the periphery. The femoral hernia refers to the skin caused by infection of fungus on the medial side, perineum and buttocks. disease. 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 indirectly through clothing, or suffering from enough sputum, 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 disease occurs mostly in summer, and the humid or hot climate often exacerbates the condition and relieves or heals in winter.

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

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. 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.

an examination

Related inspection

Rash urinary routine blood routine routine syphilis qualitative test

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 summer is easy to be aggravated and the itch is noticeable. In winter, it can be naturally relieved and the condition is stable. If the disease is not treated in time, it can be delayed for a long time.

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

Differential diagnosis of the rash on the inside of the thigh near the scrotum:

1, seborrheic dermatitis: sometimes can also invade the genital area, the rash is pale red spots, there is desquamation, some are ring-shaped, the boundary is clear, but the direct microscopic examination of fungi is negative.

2, red sputum: skin disease caused by a coryneform bacillus, common in the armpits, thighs, etc., the skin of the lesion is brick red, no inflammatory ring at the edge, no itching, direct microscopic examination of fungi is negative.

3, psoriasis: commonly known as psoriasis, can invade the thigh, showing ring or plaque erythema, generally thick surface of the scales, other parts of the body can also have the same rash.

4. Scrotal eczema and dermatitis: The lesions are mainly mossy or eczema-like changes, the edges are unclear, the center has no self-healing tendency, the itch is significant, and the development of skin lesions is not closely related to the season. It should be noted that the femoral hernia is prone to eczema-like changes after intense rubbing, hot water scalding or topical irritant drugs. The course of the disease is repeated and it is more difficult to treat.

5, vitamin B2 deficiency: is due to the lack of vitamin B2 (riboflavin) in the skin caused by skin, scrotum and oral syndrome, mainly scrotal inflammation, began to appear diffuse red patches of scrotum, clear boundaries, margins Slightly higher than the leather surface, covered with grayish white scales or brownish black thick enamel, scaly bacteria negative. At the same time, combined with glossitis and angular cheilitis, there is a tendency of collective disease in the same food unit.

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