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 ...

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 ...

Tree pollen allergies are a common form of allergic reaction. It can cause allergic rhinitis or hay fever, with symptoms including itchy eyes, congestion, runny nose, and more. Tree pollen causes the ...

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

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 ...

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 ...