Syphilis-related rashes, however, are contagious. So it's crucial to get a proper and prompt diagnosis, Hu says. While the rash may be alarming, Hu says, it doesn't typically itch or burn.

Skin rashes have many causes and vary widely in ... Anyone of any age can experience a drug reaction. Symptoms typically ...

Thyroid-related rashes most commonly appear in the creases of the skin. "A rash that could be linked to thyroid problems ...

The most common allergy rashes include atopic dermatitis (eczema), allergic contact dermatitis, and hives. Common symptoms include a red, itchy, and swollen rash and blisters that ooze and crust.