Groin Lumps: Causes, Symptoms, and When to See a Doctor - Oncology

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Inguinal hard lump?


There is a hard lump about 3-4 cm long in the groin area that hurts when pressed and also causes pain when walking due to friction.
This occurs almost every month around the time of menstruation, with similar lumps appearing near the labia and under the armpits, alternating in location.
The lumps become red, swollen, and painful for about 3-5 days before subsiding.
What could be the issue? Are there any preventive measures? Should I see a doctor, and if so, which specialist should I consult? It happens almost every month, and it's quite bothersome.
Thank you.

JoJo, 30~39 year old female. Ask Date: 2018/01/07

Dr. Hu Ziren reply Oncology


It is recommended to see a gynecologist.
Note: The groin lump that changes with the menstrual cycle may be due to endometriosis.
The lump in the armpit that also changes with the menstrual cycle could simply be caused by heat or may be related to inflammatory conditions such as acne or swollen axillary lymph nodes.

Reply Date: 2018/01/07

More Info


Understanding groin lumps can be quite concerning, especially when they are painful and recurrent. Based on your description, it seems that you are experiencing painful lumps in the groin area that appear cyclically, particularly around your menstrual cycle. These lumps could be indicative of several conditions, and it is essential to understand their potential causes, symptoms, and when to seek medical attention.


Possible Causes of Groin Lumps
1. Lymphadenopathy: The groin area contains lymph nodes that can become swollen due to infections, inflammation, or malignancies. If you are experiencing lumps that are painful and tender, it could be a sign of lymphadenopathy, which may occur due to infections in the lower body, such as sexually transmitted infections (STIs), skin infections, or even systemic infections.

2. Hidradenitis Suppurativa: This is a chronic skin condition characterized by lumps in areas where skin rubs together, such as the groin, armpits, and under the breasts. These lumps can become inflamed, painful, and may drain pus. They often recur and can be associated with hormonal changes, which might explain their cyclic nature.

3. Folliculitis or Boils: Inflammation of hair follicles can lead to painful lumps, often caused by bacterial infections. These can occur in the groin area and may be exacerbated by friction from clothing or activities.

4. Cysts: Sebaceous cysts or epidermoid cysts can develop in the groin area. These are usually painless unless they become infected, in which case they can become red, swollen, and tender.

5. Inguinal Hernia: Although less likely to present as a painful lump that resolves quickly, an inguinal hernia can cause discomfort and may present as a bulge in the groin area, especially when straining or lifting.


Symptoms to Monitor
- Pain: The pain you experience when pressing on the lump or during movement is significant. Note if the pain worsens or changes in character.

- Duration: You mentioned that the lumps last for about 3-5 days before subsiding. Keep track of this pattern.

- Associated Symptoms: Pay attention to any other symptoms such as fever, chills, or systemic signs of infection, which would warrant immediate medical attention.


When to See a Doctor
Given that these lumps are recurrent and painful, it is advisable to consult a healthcare provider. You should consider seeing a dermatologist or a primary care physician who can evaluate your symptoms in detail. If there are signs of infection (such as fever or increased redness), or if the lumps persist or worsen, seek medical attention promptly.


Prevention and Management
While it may be challenging to prevent these lumps entirely, there are some strategies you can employ:
- Hygiene: Maintain good hygiene in the groin area to reduce the risk of infections.

- Loose Clothing: Wear loose-fitting clothing to minimize friction and irritation in the area.

- Avoid Irritants: Be cautious with products that may irritate the skin, such as certain soaps or lotions.

In conclusion, while the lumps you are experiencing could be due to various benign conditions, their recurrent nature and associated pain warrant a thorough evaluation by a healthcare professional. Early diagnosis and management can help alleviate your symptoms and prevent further complications.

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