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Hidradenitis (“bitch udder”): causes, treatment and when surgery is needed

Other names: Гидраденит, сучье вымя, воспаление потовой железы под мышкой, гнойный гидраденит, инверсные акне, болит шишка под мышкой, хронический гидраденит

Hidradenitis is a purulent inflammation in the area of ​​apocrine sweat glands - in the armpits, groin, perineum, under the breasts. Popularly, the acute form is called “bitch udder”: a painful, dense nodule forms under the skin, which turns red, softens and can burst open with the release of pus. In addition to acute hidradenitis associated with bacterial infection, there is chronic hidradenitis suppurativa, or acne inversions. This is an immunoinflammatory disease of the hair follicles with recurring nodules, fistulas and scars, exacerbations of which are provoked by smoking, excess weight and friction. The acute process usually heals quickly, but the chronic form requires long-term observation by a dermatologist and sometimes surgical treatment.

🧾 МКБ-10: L73.2 🏥 Where it is treated: 8 Armpits, groin, crotchDo not heat or squeezeThe chronic form is not just an infection
👨‍⚕️ Which doctor
Dermatologist, surgeon
🔬 Diagnostics
Examination, culture of pus, blood glucose, ultrasound of soft tissues as indicated
💊 Treatment
Antibiotics, opening the abscess; in the chronic form - long-term therapy and excision of lesions
📈 Prognosis
The acute form is curable; chronic occurs with exacerbations, but can be controlled
⚠️ At risk
Smoking, overweight, diabetes, friction, sweating, shaving underarms
⏱ When to see a doctor
Urgent for abscess; planned for chronic course

🚨 See a doctor urgently

With these signs do not wait for a scheduled appointment — the condition requires emergency care.

  • Температура выше 38 °C, озноб
  • Быстро растущий очень болезненный узел
  • Покраснение, распространяющееся на окружающую кожу
  • Красная полоса от очага и болезненные лимфоузлы
  • Узлы постоянно возвращаются в одних и тех же местах
  • Свищи с постоянным выделением гноя

Acute and chronic hidradenitis

Acute hidradenitis develops when bacteria, most often Staphylococcus aureus, enters the ducts of the sweat glands through microtrauma. The process is usually single and does not return after treatment. Chronic hidradenitis suppurativa is structured differently: it begins with a blockage of the hair follicle and inflammation, in which the immune system plays a major role, and bacteria are added secondarily. This form often appears after puberty, lasts for years with exacerbations and leads to the formation of passages under the skin and scars.

  • Acute hidradenitis suppurativa - single abscess
  • Chronic hidradenitis suppurativa (acne inversions)
  • Easy stage - individual nodes without fistulas
  • Moderate - recurring abscesses with fistulas
  • Severe - merging lesions and scars

Causes and risk factors

Sweating, friction from clothing, cuts from shaving, deodorants that irritate the skin, and reduced immunity predispose to acute inflammation. The chronic form is associated with hereditary predisposition, hormonal influences, smoking and obesity. Excess weight increases friction and moisture in the folds, and smoking increases follicle blockage. The disease is not associated with uncleanliness and is not transmitted from person to person, although patients are often embarrassed by this and consult a doctor late.

  • Smoking
  • Excess body weight
  • Diabetes mellitus
  • Shaving and epilation of armpits
  • Tight synthetic clothing
  • Heredity

Symptoms

First, a dense, painful nodule under the skin appears in the armpit or groin, which itches and interferes with movement. Over the course of a few days, it enlarges, the skin above it turns red and acquires a bluish tint, and the node fuses with it and resembles an udder. Then softening appears in the center, and the abscess can open with the release of thick pus. In the chronic form, the nodes reappear, passages are formed connecting the lesions, paired black dots and retracted scars.

  • Painful tight knot in the fold
  • Redness and swelling of the skin
  • Softening and discharge of pus
  • Limitation of hand movement
  • Increased temperature with an abscess
  • Chronic fistulas and scars

Diagnostics

The diagnosis is made upon examination based on the characteristic location and type of nodes. The doctor clarifies how many exacerbations there were, whether there are fistulas and scars, whether the patient smokes, or whether there is diabetes. Culture of pus helps to select an antibiotic if the course is persistent. Ultrasound of soft tissues shows the size of the abscess and subcutaneous passages, which is important before surgery. It is necessary to distinguish hidradenitis from a boil, inflamed atheroma, lymphadenitis and Crohn's disease with damage to the perineum.

  • Examination by a dermatologist or surgeon
  • Culture of discharge for microflora and sensitivity
  • Complete blood count and glucose
  • Ultrasound of soft tissues
  • Assessment of the stage of the chronic process

Treatment and prevention

At the early stage of acute hidradenitis, the doctor prescribes antibiotics and local antiseptics. A mature abscess is opened and drained by a surgeon; You cannot squeeze out or pierce the knot yourself, as well as apply warm compresses without a prescription. The chronic form is treated for a long time: with courses of anti-inflammatory antibiotics, local remedies, and in severe cases - with genetically engineered drugs. Recurrent lesions with fistulas are excised surgically. Quitting smoking and losing weight significantly improves the course.

  • Do not squeeze or pierce knots
  • Stop smoking
  • Lose weight if you are overweight
  • Wear loose cotton clothes
  • Remove hair carefully or temporarily stop shaving
  • Control sugar levels in diabetes

Services and prices for this diagnosis

Based on official price lists of Tashkent clinics. The exact cost is determined after examination.

💊 Treatment

Frequently asked questions: Hidradenitis ("bitch udder")

Is it possible to cure hidradenitis without surgery?+
Acute hidradenitis at an early stage is often curable with antibiotics and topical remedies. If an abscess with pus has already formed, surgical opening is necessary - usually a minor outpatient procedure. In the chronic form, surgery is required for persistent fistulas and scars.
Why does hidradenitis come back?+
Repeated nodules in the same places are characteristic of chronic hidradenitis suppurativa, which is associated with inflammation of the hair follicles, not just infection. Exacerbations are supported by smoking, excess weight, friction and sweating. This course requires long-term treatment by a dermatologist.
Is it possible to warm a “bitch’s udder”?+
It is not recommended to heat the inflamed node yourself: if pus has formed, heat can contribute to the spread of infection. Any procedures, including physical therapy, are prescribed by the doctor after examination. You can't squeeze out the knot either.
Is hidradenitis contagious?+
No. Chronic hidradenitis suppurativa is not transmitted to other people, and the acute form is associated with bacteria that live on the skin of many people. However, if pus is discharged, you should use a separate towel and wash your hands thoroughly.
Which doctor should I contact for a lump under my arm?+
With a painful ripening node - see a surgeon who, if necessary, will open the abscess. For recurring inflammations, see a dermatologist. A painless lump without redness should also be shown to a doctor, as it may be an enlarged lymph node.

The information on this page is for reference only and does not replace a doctor consultation. Only a qualified specialist can make a diagnosis and prescribe treatment after an in-person examination.

Where it is treated hidradenitis в Ташкенте

При созревшем абсцессе нужен хирург, а при повторяющихся узлах — дерматолог, который подберёт длительное лечение. Clinics Ташкента с дерматологами:

Tashkent, Uchtepa district, Chilanzar 12 apt., st. M. Shaykhzoda, 7
M Olmazor 🚶 1.2 km
M Chilonzor 🚶 1.7 km
M Mirzo Ulug'bek 🚶 2.5 km
🚌 Nearest bus stop 🚶 260 m · buses: 8, 41
Mon–Fri:08:30–17:00
Closed now
Tashkent, Учтепинский district, Chilonzor 12 block, st. М.Шайхзода, 7
M Olmazor 🚶 1.2 km
M Chilonzor 🚶 1.7 km
M Mirzo Ulug'bek 🚶 2.5 km
🚌 Nearest bus stop 🚶 310 m · buses: 8, 41
Mon–Fri:08:30–17:00
Closed now
Tashkent, Mirabad district, st. Oybek, 34d
M Toshkent 🚶 550 m
M Oybek 🚶 850 m
M Kosmonavtlar 🚶 1.3 km
🚌 Nearest bus stop 🚶 150 m · buses: 22
Tashkent, Shaikhantaur district, 10d. Landmark: Labzak
M Minor 🚶 900 m
M Bodomzor 🚶 1.0 km
M Abdulla Qodiriy 🚶 1.3 km
🚌 Nearest bus stop 🚶 320 m · buses: 35
Mon–Fri:09:00–17:00
Closed now
Tashkent, Olmazar Tumani, Kichik Khalka Yuli 5 "A" y
M Beruniy 🚶 500 m
M Tinchlik 🚶 1.1 km
M Chorsu 🚶 2.9 km
🚌 Nearest bus stop 🚶 190 m · buses: 31, 34
Mon–Fri:08:30–17:00
Closed now
Zulfiyahonim st., 18
M Alisher Navoiy 🚶 1.1 km
M G'afur G'ulom 🚶 1.3 km
M Abdulla Qodiriy 🚶 1.7 km
🚌 Nearest bus stop 🚶 90 m · buses: 35
Пн–Sat:00:00–24:00
Open now
st. Buyuk Ipak Yuli, building 131A, Mirzo-Ulugbek district, Tashkent Landmarks: carpet sto...
M Buyuk Ipak Yo'li 🚶 200 m
M Pushkin 🚶 1.8 km
M Hamid Olimjon 🚶 2.8 km
🚌 Nearest bus stop 🚶 70 m · buses: 1, 24
Mon–Fri:09:00–17:00
Closed now
Tashkent, Mirabad district, st. Nukussky, 14d
M Choshtepa 🚶 2.8 km
M O'zgarish 🚶 3.2 km
M Oybek 🚶 3.6 km
🚌 Nearest bus stop 🚶 280 m · buses: 9Т, 12
Mon–Fri:09:00–17:00
Closed now

ICD-10 code

Official international classification codes — these are used in medical records and statistics.

Other diseases: Dermatology

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