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2. Cold urticaria - Wikipedia

   en.wikipedia.org/wiki/Cold_urticaria

   Cold urticaria (essentially meaning cold hives) is a disorder in which large red welts called hives (urticaria) form on the skin after exposure to a cold stimulus. [1] The hives are usually itchy and often the hands, feet and other parts of the body will become itchy and swollen as well.

3. 10 ways to tell the difference between allergies and a cold

   www.aol.com/news/2015-04-14-10-ways-to-tell-the...

   A cold is contagious and in many cases, you can identify the person who gave it to you. Cold symptoms occur a few days after exposure to a virus, whereas allergies usually begin immediately after ...

4. Is it COVID-19, the flu, allergies or a regular ol’ cold ...

   www.aol.com/covid-19-flu-allergies-regular...

   These are the different symptoms and treatments for common respiratory conditions.

5. What Is the Difference Between a Fever Blister and a Cold Sore?

   www.aol.com/difference-between-fever-blister...

   If you tend to develop cold sores or fever blisters on your lips, you are not alone. Herpes simplex virus (HSV)-1 affects more than half of all people in the U.S. by the time they reach their 20s.

6. Allergic rhinitis - Wikipedia

   en.wikipedia.org/wiki/Allergic_rhinitis

   Allergy testing may reveal the specific allergens to which an individual is sensitive. Skin testing is the most common method of allergy testing. [39] [failed verification] This may include a patch test to determine if a particular substance is causing the rhinitis, or an intradermal, scratch, or other test. Less commonly, the suspected ...

7. Side effects of penicillin - Wikipedia

   en.wikipedia.org/wiki/Side_effects_of_penicillin

   Side effects may only last for a short time and then go away. Side effects can be relieved in some cases with non pharmacological treatment. [4] Some side effects require treatment to correct potentially serious and sometimes fatal reactions to penicillin. Penicillin has not been found to cause birth defects. [5]

8. Got snot? Here's what your mucus tells you about allergies ...

   www.aol.com/lifestyle/got-snot-heres-mucus-tells...

   This is very common with allergies, Dr. Purvi Parikh, a board-certified allergist and immunologist with the Allergy and Asthma Network, tells Yahoo Life. Bright yellow or dark green . This is ...

9. Allergic contact dermatitis - Wikipedia

   en.wikipedia.org/wiki/Allergic_contact_dermatitis

   A patch test (contact delayed hypersensitivity allergy test) [17] is a commonly used examination to determine the exact cause of an allergic contact dermatitis. According to the American Academy of Allergy, Asthma, and Immunology, "patch testing is the gold standard for contact allergen identification". [2]