[50M] Experiencing blotchy skin rash on standing

What might be happening

Based on your symptoms, the following conditions could be possible:

• Orthostatic purpura: This is a condition where blood vessels in the skin dilate in response to gravity when standing. This can cause a blotchy red rash that disappears when lying down. The fact that your rash appears upon standing and disappears when lying down or after a night's sleep is consistent with this condition.

• Livedo Reticularis: This is a vascular condition that results in a mottled skin appearance, often described as a lace-like network of patches. The fact that you described your rash as resembling livedo reticularis and that it appears as a blotchy red pattern on your stomach could suggest this condition. However, livedo reticularis typically does not disappear upon lying down.

• Dermatographism: This is a form of physical urticaria where the skin becomes raised and inflamed when stroked, rubbed, or scratched. This could explain why your rash appears upon standing (due to clothes rubbing against your skin) and disappears when lying down. However, dermatographism typically causes itchiness, which you did not report.

What you can do

1. Consult a Dermatologist: Given the chronic nature of your symptoms and the potential diagnoses, it would be best to consult a dermatologist. They can provide a formal assessment and order relevant tests if necessary.

2. Avoid Triggers: If you notice that certain activities or conditions (like standing for long periods) trigger your rash, try to avoid them as much as possible.

3. Maintain Skin Hygiene: Keep your skin clean and moisturized. Avoid using harsh soaps or detergents that could irritate your skin.

4. Monitor Symptoms: Keep track of when your rash appears, how long it lasts, and any associated symptoms. This will be useful information for your dermatologist.

What you should look out for

• If your rash becomes painful or itchy
• If you notice swelling, warmth, or other signs of infection in the areas of the rash
• If you develop any other symptoms, such as fever, joint pain, or unexplained weight loss

Please remember that while I strive to provide accurate information, I'm not a doctor and this advice should not replace a consultation with a healthcare professional.