Progesterone dermatitis is a rare immune sensitivity condition. Symptoms present like common skin conditions, including eczema and hives, or allergic reactions. Experts weigh in to help you understand ...

A hazelnut allergy is a common type of tree nut allergy that usually begins during childhood. Avoiding hazelnuts is the best way to prevent associated allergic reactions. Tree nut allergies are ...

An allergic reaction happens when your immune system defends against substances that otherwise wouldn’t pose a threat to your ...

Skin allergies are common and often frustrating to diagnose. But new technology could soon help change that. Dr. Alison Bruce, a dermatologist at the Mayo Clinic, is helping to develop an artificial ...

Share on Pinterest A new study suggests TikTok skin care videos catering to young girls contain harsh active ingredients, which may cause irritation and allergies. Filippo Bacci/Getty Images New ...

Living with allergies can be difficult. Symptoms can mess with your day-to-day life or, in some cases, be life-threatening. Even if your allergies only show up seasonally, symptoms can impact your ...

A woman with over 40 allergies — including WATER — has to use a color-coded spread sheet to keep track of them all. Chloe Ramsay, 19, was born with lots of food allergies and would even go into ...

A new study from North Carolina State University found that neutrophils—white blood cells that are a key part of the immune ...

Researchers have found that stress decreases the capacity of specialized cells called programmed death ligand 2-positive macrophages to clear out dead cells in lesion sites, leading to worsening of ...

People can develop allergic reactions to the ingredients in tattoo ink. An allergic reaction to a tattoo can emerge years after a person gets tattooed. Medication may be necessary to treat the immune ...