Pictures of erythema on the penis epidermis

Many people often develop erythema on their male genitals. Some of these erythema are generally itchy, while others are itchy and painful. Based on the symptoms, it can be considered that it is due to poor development of the boy or long foreskin, which causes necrosis and infection caused by obstruction of the urethral opening. In addition, it is local trauma that causes inflammation of the skin surface. However, if there is inflammation, it will generally cause pain and itching. If there is no such symptom and the cause cannot be clearly identified, it is necessary to go to the hospital outpatient clinic for examination.

Causes of disease

Physiological factors

Poor or abnormal growth and development of the male genitals can lead to poor anatomical structure of the male genitals, long foreskin and prepuce hyperplasia, which can cause irritation of the glans penis and urethra due to urine retained in the urethra and urine scale in the foreskin cavity, or foreskin incarceration, leading to hematoma, swelling, ischemia, necrosis of the glans penis, thereby reducing the anti-infection ability of the glans penis and urethra, making it easy to be infected by bacteria.

Partial injury

Normally, the glans penis and genital skin have strong resistance to all normal beneficial bacteria living in the genital skin and some pathogenic bacteria that infect the genital skin, so under normal physiological conditions, genital skin infections are generally not likely to occur. However, if the glans penis or its skin is damaged by squeezing, pinching, strong masturbation, sexual intercourse, and oral sex, it may be possible for pathogenic bacteria and standard highly pathogenic bacteria to infect the genital tissues and cause genital inflammation.

Reduced body resistance

The occurrence of some infections of the male genitals is often significantly associated with factors such as fever, cold, diabetes, overwork, intestinal flora imbalance, tumors or the use of immunopotentiators, which lead to the body's resistance or reduced resistance. For example: fever or excessive fatigue can reduce the body's resistance, which can often cause the activation of latent herpes simplex virus (HSV) and recurrent infection; diabetics, cancer patients and patients treated with immunosuppressants are often prone to genital tissue infections caused by Saccharomyces spp. and other strains due to reduced immunity; improper use and misuse of antibiotics can lead to urethral intestinal flora imbalance, which can cause infection with some drug-resistant pathogens and standard highly pathogenic pathogens and cause inflammation of the glans penis or glans dermatitis.

Clinical symptoms

The main symptoms of penile inflammation are redness, swelling, pain and itching of the glans penis and foreskin. Male genital inflammation is common in men around 20-30 years old. The lesions mainly occur at the intersection of the edge of the glans penis and the coronal sulcus and/or the frenulum of the penis. The lesions are papules of 1-3mm in size, located on both sides of the frenulum of the penis. The top of the papules is round and smooth, and some papules are hairy or flocculent. The papules are mostly combined with each other, and are mostly clustered and arranged in one or several rows, which are obvious between the glans penis bones, and can partially or completely surround the glans penis. The color of the lesions is mostly pearly white, very few are dark red, skin color, and some may be slightly swollen. There is no tenderness, no rupture, and the patient has no active symptoms. The histological pathophysiological examination of male genital inflammation mainly shows excessive keratinization, moderate to severe hyperplasia of the epidermis, normal dermis, slight hyperplasia and high density of fibroblasts in the dermis, hyperplasia and dilation of dermal papilla capillaries at different levels, a small amount of reticulocyte infiltration around, and no cavitary cells.