There is a red rash on the glans penis, it doesn't itch or hurt

Once a rash appears, it is usually accompanied by pain or itching. The rash may appear anywhere on the body. Some people develop a rash on the glans penis without feeling it. Although it seems to have no effect, the presence of a rash on such an important part of the body will definitely cause concern for the risk of disease. If there is a red rash on the glans that is not itchy or painful, the most likely cause is balanitis. It is best to treat it in time, otherwise other diseases may occur.

Balanitis, also known as inflammation of the glans penis, refers to inflammation of the glans penis caused by trauma, irritation or infection. Since balanitis often coexists with inflammation of the inner lining of the foreskin, balanitis and posthitis are often collectively referred to as balanitis. The main clinical manifestations are local redness, swelling, erosion and ulceration. Balanitis can retrogradely infect the urinary system, causing cystitis, pyelonephritis, etc. In addition, if the inflammation is not cured for a long time, it can directly affect sexual life, leading to impotence, premature ejaculation and other phenomena. This disease is more common in summer and autumn, and mostly occurs in middle-aged and young men, especially those with phimosis or prepuce.

Clinical manifestations

1. Acute superficial balanitis

It is mainly seen in young and middle-aged people with active sexual life, and the infecting bacteria are usually the same strain as the bacterial vaginosis of their sexual partners. At the beginning of the disease, the local skin becomes flushed and the glans penis feels burning and itchy. In the acute stage, if the foreskin is turned back, edema, erythema, erosion, exudation and bleeding can be seen on the glans penis. In severe cases, blisters may appear. If secondary infection occurs, ulcers may form, covered with purulent exudate, and local pain and tenderness may be obvious. Some patients may experience mild systemic symptoms, such as fatigue and weakness. In the chronic stage, only flake-like redness or porcelain-like cracks are seen on the inner layer of the foreskin and the coronal sulcus.

2. Annular ulcerative balanitis

It may be the early mucosal damage of Reites disease or it may be related to the long-term irritation of smegma. The clinical manifestations are erythema on the glans penis, which gradually expands and becomes ring-shaped or multi-ring-shaped, and may later form shallow ulcers. The main feature of this disease is one to several round lesions on the glans penis, with a red erosive surface in the middle and a white narrow band on the edge, connected into a ring shape. Secondary infection may worsen symptoms and cause the ring to lose its ring-like characteristics.

3. Candidal balanitis

It is caused by Candida infection, the most common being Candida albicans. The clinical manifestations are erythema of the foreskin and glans, smooth surface, slight desquamation around, scattered papules or pustules around, which slowly expand to the surrounding area. In the acute phase, edema, erythema, erosion, and exudation may occur. In severe cases, the disease may affect the penis, scrotum, inner thigh and groin. It is mostly caused by sexual contact, and may also be secondary to diabetes, wasting diseases, and long-term, large-scale antibiotic or hormone treatment.

4. Plasma cell balanitis

It is more common in middle-aged patients. Generally there are no obvious symptoms. The glans penis develops persistent, localized, infiltrative, dark reddish-brown patches with clear boundaries, smooth surface, many small red spots or erosions, easy bleeding, and no ulcers. Histopathology is diagnostic and is characterized by a band-like infiltration of inflammatory cells in the superficial dermis, interspersed with a large number of plasma cells.

5. Amebic balanitis

When the foreskin and glans become inflamed, the barrier function of the epithelium is lost, making it easy for amoeba infection to occur. The clinical manifestations are infiltrative erythema, erosion, shallow ulcers, obvious tissue necrosis and pain on the glans penis.

6. Mica and keratotic pseudoepitheliomatous balanitis

It is more common in patients over 50 years old and is often accompanied by phimosis. The skin of the glans penis is infiltrated and hypertrophic, with local hyperkeratosis and mica-like crusts, which are silvery white. The glans penis loses its normal elasticity and gradually shrinks.

7. Trichomonas balanitis

It is a mild, temporary erosive glans inflammation caused by Trichomonas infection. Patients often experience itching, which worsens during urination. Initially, erythema and papules appear on the glans penis with clear boundaries and gradually expand in scope. There may be small blisters ranging in size from needle tips to millet grains on the erythema. The blisters may expand and fuse with each other to form a mild erosive surface.

8. Balanitis sicca obliterans

The early stage of the disease is chronic balanitis, with thickened mucosa, ivory white lesion area, and desquamation of the epidermis. In the late stage, local atrophy occurs as scar-like growth. It can cause urethral stenosis and foreskin adhesion.