Motion Sickness and Unusual Bumps on the Buttocks

Q: Motion Sickness and Unusual Bumps on the Buttocks

Dear Miss Anonymous：<br>1. <br>Dizziness generally refers to sensations such as vertigo, lightheadedness, feeling faint, blurred vision, and a sense of impending loss of consciousness, as well as feelings of heaviness in the head and unsteadiness, sometimes accompanied by a darke

Hard lumps in the buttocks and motion sickness?

1.
Recently, I started feeling a bit nauseous shortly after getting into a car, similar to the sensation of having something stuck in my throat, but without any dizziness.
Is this motion sickness? If so, why have I suddenly become so susceptible to it, especially since I have never experienced motion sickness before? (Due to the pandemic, I have been riding in cars infrequently, and previously I could use my phone in the car on winding roads without any issues.)
2.
A few months ago, I noticed a round protrusion on the flesh of my buttocks, about the size that can be covered by the tip of my index finger.
When I pinch it, it feels like there is something inside.
It appears to be a light black circular shape, perhaps a bit grayish (since I looked at it in the mirror, it was somewhat unclear, but it is definitely not as dark as a mole).
It does not hurt when touched or pressed, and it hasn't grown in size over the past few months (even if it has, it’s only a little that I haven't noticed), and the surface has no openings.
I would like to know what this could possibly be, and whether sitting on a hard chair or floor and pressing against it would have any implications.

Niming, 10~19 year old female. Ask Date: 2021/07/28

Dr. Xiao Yongxun reply Family Medicine

Dear Miss Anonymous:
1.
Dizziness generally refers to sensations such as vertigo, lightheadedness, feeling faint, blurred vision, and a sense of impending loss of consciousness, as well as feelings of heaviness in the head and unsteadiness, sometimes accompanied by a darkening of vision.
2.
Nausea is an uncomfortable sensation that often precedes vomiting, characterized by the contraction of the gastrointestinal tract and abdominal muscles, which can lead to the forceful expulsion of stomach contents through the mouth, known as vomiting.
3.
Based on your description, "I recently started feeling a bit nauseous shortly after getting into a car, similar to the sensation of having something stuck in my throat, but without dizziness," it seems more aligned with nausea.
However, differential diagnosis should consider a variety of conditions, including infectious diseases, gastrointestinal disorders, central nervous system diseases, metabolic issues, drug or toxin effects, glaucoma, myocardial infarction, radiation therapy, bowel obstruction, and more.
It is advisable to consult with your family physician for evaluation and discussion before making any decisions, or to directly visit a gastroenterology clinic at a regional hospital or higher.
4.
Regarding the lump on your buttock, there are several potential diagnoses to consider.
Common causes include fibromas, moles, lipomas, hemangiomas, abscesses, neurofibromas, and sebaceous cysts.
Clinically, we often advise patients to monitor for changes in size or color to assess the potential for malignancy.
However, it is still recommended that you consult with your family physician for evaluation and discussion before making any decisions, or to directly visit a dermatology clinic at a regional hospital or higher.

Reply Date: 2021/07/28

More Info

Understanding motion sickness and unusual bumps on the buttocks involves addressing two distinct health concerns. Let's break them down one by one.

Motion Sickness
1. Symptoms and Causes: The sensation of nausea you are experiencing while in a vehicle, especially after a period of not traveling, is indeed indicative of motion sickness. Motion sickness occurs when there is a disconnect between the sensory signals your brain receives. For instance, your inner ear (which helps control balance), eyes, and deeper body parts send conflicting messages to your brain. This can lead to symptoms like nausea, vomiting, dizziness, and sweating.
2. Why Now?: The fact that you have not experienced motion sickness in the past but are now feeling nauseous could be attributed to several factors. After a long period of reduced travel due to the pandemic, your body may have become less accustomed to the sensations associated with movement. Additionally, stress and anxiety levels may have increased during this time, which can also contribute to the onset of motion sickness. If you were previously able to use your phone while traveling without issue, the change in your body's response could be due to a combination of decreased tolerance and increased sensitivity to motion.

3. Management Strategies: To manage motion sickness, consider the following strategies:
- Positioning: Sit in the front seat if possible, as this can help reduce the feeling of nausea.

- Focus: Look at the horizon or a stable point outside the vehicle rather than focusing on moving objects inside the car.

- Fresh Air: Ensure good ventilation in the vehicle. Fresh air can help alleviate symptoms.

- Medication: Over-the-counter medications like dimenhydrinate (Dramamine) or meclizine can be effective for preventing motion sickness. Consult with a healthcare provider before taking any medication.

Unusual Bumps on the Buttocks
1. Description and Concerns: The bump you described on your buttocks sounds like it could be a lipoma, which is a benign tumor made of fat tissue. Lipomas are generally soft, movable, and painless, and they can vary in size. The fact that it has not changed significantly over the months and does not cause pain is reassuring, but it is essential to monitor any changes.

2. Other Possibilities: Other possibilities for a bump could include cysts, dermatofibromas, or even a benign skin lesion. The color and texture you described do not immediately suggest a malignant condition, especially since it has not changed in size or caused discomfort.

3. Impact of Pressure: Sitting on hard surfaces may cause discomfort if the bump is pressed against them, but it is unlikely to cause any harm to the bump itself. However, if you notice any changes in the bump, such as increased size, pain, or changes in color, it would be prudent to consult a healthcare professional for a thorough evaluation.

Conclusion
In summary, your symptoms of motion sickness may be a result of decreased exposure to travel and increased sensitivity. Managing your environment and possibly using medication can help alleviate these symptoms. Regarding the bump on your buttocks, while it sounds benign, monitoring it for changes is essential. If you have any concerns or if the bump changes, seeking medical advice would be the best course of action. Always prioritize your health and well-being, and don’t hesitate to reach out to a healthcare provider for personalized advice.

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