What causes a Skin rash with red lines?

There are several potential causes for a skin rash with red lines, including:

1. Allergic reactions: Rashes accompanied by red lines can be a sign of an allergic reaction. This could be due to contact with an allergen, such as poison ivy, or an allergic reaction to a medication or food.

2. Infections: Bacterial or viral infections can cause rashes with red lines. Common infections that may lead to such rashes include cellulitis, impetigo, shingles, and erysipelas.

3. Eczema (Atopic Dermatitis): Eczema is a chronic inflammatory skin condition that often appears as a red, itchy rash with red lines.

4. Insect bites or stings: The bites or stings of insects, such as mosquitoes, spiders, and bees, can cause rashes with red lines.

5. Drug reactions: Certain medications can cause rashes as a side effect, sometimes accompanied by red lines.

6. Vasculitis: This refers to inflammation of the blood vessels, which can lead to rashes with red lines.

7. Autoimmune disorders: Some autoimmune conditions, such as lupus or dermatomyositis, may cause rashes with red lines.

8. Contact dermatitis: This is an inflammatory reaction caused by direct contact with an allergen or irritant, leading to a rash with red lines.

It's important to note that diagnosing the exact cause of a skin rash with red lines requires a proper medical evaluation by a healthcare professional, as the underlying condition may vary widely. If you experience such a rash, it's advisable to seek medical attention for accurate diagnosis and appropriate treatment.