Allergies - Symptoms and causes - Mayo Clinic
2024年8月24日 · Symptoms. Allergy symptoms depend on what allergen is involved. The symptoms can affect the airways, sinuses and nasal passages, skin, and digestive system. Allergic reactions can range from mild to severe. Sometimes, allergies can trigger a life-threatening reaction known as anaphylaxis. Hay fever, also called allergic rhinitis, can cause ...
Contact dermatitis - Symptoms and causes - Mayo Clinic
2024年5月2日 · Contact dermatitis shows up on skin that has been directly exposed to the substance causing the reaction. For example, the rash may show up along a leg that brushed against poison ivy. The rash can develop within minutes to hours of exposure, and it can last 2 to 4 weeks. Signs and symptoms of contact dermatitis vary widely and may include:
Allergies - Diagnosis and treatment - Mayo Clinic
2024年8月24日 · Allergy symptoms can range from mild to severe, even life-threatening. Find out what treatments and prevention tips can help.
Dermatitis - Symptoms and causes - Mayo Clinic
A common cause of dermatitis is contact with something that irritates your skin or triggers an allergic reaction. Examples of such things are poison ivy, perfume, lotion and jewelry containing nickel. Other causes of dermatitis include dry skin, a viral infection, bacteria, stress, genetic makeup and a problem with the immune system. Risk factors
Itchy skin (pruritus) - Symptoms and causes - Mayo Clinic
2024年10月23日 · Irritation and allergic reactions. Wool, chemicals, soaps and other things can irritate the skin and cause rashes and itching. Sometimes a substance, such as poison ivy or cosmetics, causes an allergic reaction. Also, reactions to certain medicines, such as narcotics to treat pain (opioids) can cause itchy skin.
Atopic dermatitis (eczema) - Symptoms and causes - Mayo Clinic
2024年5月15日 · Allergic contact dermatitis. This condition is common in people with atopic dermatitis. Allergic contact dermatitis is an itchy rash caused by touching substances you're allergic to. The color of the rash varies depending on your skin color. Sleep problems. The itchiness of atopic dermatitis can interfere with sleep. Mental health conditions.
Sun allergy - Symptoms and causes - Mayo Clinic
2024年7月19日 · How skin with sun allergy looks varies widely depending on the color of your skin and what's causing the symptoms. Signs and symptoms may include: Itchiness (pruritus) Stinging; Tiny bumps that may merge into raised patches; A …
Mold allergy - Symptoms & causes - Mayo Clinic
2021年6月21日 · Signs and symptoms of allergic rhinitis caused by a mold allergy can include: Sneezing; Runny or stuffy nose; Cough and postnasal drip; Itchy eyes, nose and throat; Watery eyes; Dry, scaly skin; Mold allergy symptoms vary from …
Food allergy - Symptoms and causes - Mayo Clinic
2024年8月30日 · Food allergy is an immune system reaction that happens soon after eating a certain food. Even a tiny amount of the allergy-causing food can trigger symptoms such as hives, swollen airways and digestive problems. In some people, a food allergy can cause severe symptoms or even a life-threatening reaction known as anaphylaxis.
Pet allergy - Symptoms & causes - Mayo Clinic
2021年8月4日 · Pet allergy is an allergic reaction to proteins found in an animal's skin cells, saliva or urine. Signs of pet allergy include those common to hay fever, such as sneezing and runny nose. Some people may also experience signs of asthma, such …