Skin Nodules: Causes and When to Seek Help

Skin nodule

Hello Doctor, about a month and a half ago, I noticed a hard lump on the skin behind my left ear.
It doesn't move, and at that time, I squeezed it and seemed to extract a hard tissue, thinking it was just a type of pimple.
Recently, I found that it has reformed and become hard again, just like it was initially.
When I squeezed it this time, I didn't feel any tissue, and now it looks like the skin is broken, with a slight protrusion.
The color of this lump appears to be a bit darker brown than the surrounding skin, and it is about 0.5 cm in size.
I would like to ask the doctor, this doesn't seem like the pimple I initially thought it was.
What could it possibly be? Could it be a malignant tumor? Thank you, Doctor.

Niming, 20~29 year old female. Ask Date: 2021/08/16

Dr. Wu Yuxin reply Dermatology

Without actually seeing the lesion, it is impossible to determine the issue.
If it is very concerning, please seek medical attention as soon as possible.
A thorough examination is necessary to understand the problem and to determine the appropriate treatment.

Reply Date: 2021/08/16

More Info

When it comes to skin nodules, understanding their nature and when to seek medical help is crucial. Based on your description, the nodule located behind your left ear has been persistent for over a month, has a firm texture, and has returned after being squeezed. The fact that it has a deeper brown color than your normal skin and is approximately 0.5 cm in size raises some important considerations.

Skin nodules can arise from various causes, including benign conditions such as cysts, lipomas (fatty tumors), or dermatofibromas. However, they can also be indicative of more serious conditions, including infections, inflammatory processes, or even malignancies. The characteristics you described—particularly the firmness, the recurrence after being squeezed, and the change in color—suggest that this nodule may not be a simple acne lesion.

1. Possible Causes:
- Sebaceous Cyst: These are common and usually harmless. They occur when sebaceous glands become blocked. They can feel firm and may become inflamed or infected.

- Lipoma: A lipoma is a benign tumor made of fat tissue. They are usually soft and movable but can sometimes feel firmer.

- Dermatofibroma: These are benign growths that can feel firm and may be brownish in color. They are often harmless but can be removed if bothersome.

- Malignant Tumors: While less common, skin cancers such as basal cell carcinoma or melanoma can present as nodules. The change in color and firmness, especially if accompanied by other symptoms like itching, bleeding, or changes in size, should be taken seriously.

2. When to Seek Help:
- Persistent Changes: If the nodule has not resolved after a few weeks, or if it continues to grow, it is advisable to seek medical evaluation.

- Color and Texture Changes: Any changes in color, texture, or size should prompt a visit to a healthcare provider.

- Associated Symptoms: If you experience pain, itching, bleeding, or any other concerning symptoms, you should consult a dermatologist.

3. Diagnosis and Treatment:
- A dermatologist will likely perform a physical examination and may recommend a biopsy to determine the nature of the nodule. This is particularly important if there is any suspicion of malignancy.

- Treatment options will depend on the diagnosis. Benign conditions may require no treatment, while malignant ones may necessitate surgical removal or other interventions.

In summary, while many skin nodules are benign, the characteristics you describe warrant further investigation. It is always better to err on the side of caution when it comes to skin changes, especially those that persist or evolve. Consulting a dermatologist will provide you with a definitive diagnosis and peace of mind. Remember, early detection is key in managing any potential skin issues effectively.

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