Is This a Corn? Foot Bumps and When to See a Doctor

Is this a corn?

Hello doctor, I have a bump on the bottom of my left foot near the little toe.
It feels hard like a callus.
When I used scissors to cut away the skin, it looked a bit black inside and appeared to have thread-like structures, and it is painful.
Is this a corn? Do I need to see a doctor?

Nan 27 sui, 20~29 year old female. Ask Date: 2005/05/11

Dr. Huang Ruiyun reply Dermatology

This doesn't look much like a corn; it may be a wart.
It's advisable to see a dermatologist for a definitive diagnosis and treatment.

Reply Date: 2005/05/11

More Info

Based on your description, it sounds like you may be dealing with a corn or possibly a plantar wart rather than a typical callus. Corns are thickened areas of skin that develop in response to pressure or friction, often occurring on the tops or sides of toes or on the soles of the feet. They can feel hard and may be painful when pressure is applied. The presence of black dots or a "stringy" appearance inside the bump could indicate a plantar wart, which is caused by the human papillomavirus (HPV) and can also be painful.

Understanding Corns and Warts
1. Corns: These are usually small, round, and hard bumps that form on the skin due to repeated friction or pressure. They are often found on the feet, particularly on the toes or the balls of the feet. Corns can be painful, especially when wearing shoes that rub against them. They are typically characterized by a hard center surrounded by inflamed skin.

2. Plantar Warts: These are caused by a viral infection and appear as rough, grainy growths on the soles of the feet. They can be painful, especially when standing or walking, and may have tiny black dots in the center, which are small blood vessels that have clotted. Unlike corns, plantar warts can spread and may require more specific treatment.

When to See a Doctor
Given that your bump is painful and has a unique appearance (black dots), it would be advisable to consult a healthcare professional, preferably a dermatologist or a podiatrist. They can provide a proper diagnosis and recommend appropriate treatment options. Here are some signs that indicate you should seek medical attention:
- Persistent Pain: If the bump continues to cause pain or discomfort, it’s important to have it evaluated.

- Changes in Appearance: If the bump changes in size, color, or shape, this could indicate a more serious condition.

- Bleeding or Discharge: If you notice any bleeding or unusual discharge from the bump, it’s crucial to see a doctor.

- Difficulty Walking: If the bump affects your ability to walk comfortably, medical intervention is necessary.

Treatment Options
If it is determined that you have a corn, treatment may include:
- Padding: Using protective pads to reduce pressure on the corn.

- Footwear Changes: Wearing shoes that fit properly and do not rub against the affected area.

- Debridement: A healthcare professional may safely remove the thickened skin using a scalpel or other instruments.

For plantar warts, treatment options may include:
- Cryotherapy: Freezing the wart with liquid nitrogen.

- Salicylic Acid: Over-the-counter treatments that gradually peel away the wart.

- Laser Treatment: In some cases, laser therapy may be recommended.

Conclusion
In summary, while it is possible that you are dealing with a corn, the presence of black dots and pain suggests that it could also be a plantar wart. Given the symptoms you described, it is advisable to consult a healthcare professional for an accurate diagnosis and appropriate treatment. Early intervention can help prevent further complications and alleviate discomfort.

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