An allergic reaction will go away by itself in most cases unless it's a severe and serious allergic reaction.
If you're having a severe allergic reaction or a life threatening allergic reaction then you should seek medical attention right away.
But for other allergic reactions that are not too severe then they will most often go away on their own.
The signs of a severe allergic reaction are.
Skin rashes, itching or hives.
Swelling of the lips, tongue or throat.
Shortness of breath, trouble breathing or wheezing (whistling sound during breathing)
Dizziness and/or fainting.
Stomach pain, bloating, vomiting, or diarrhea.
Uterine cramps.
Feeling like something awful is about to happen.
An allergic reaction is serious if you get a skin rash that may include itchy, red, swollen, blistered or peeling skin. you're wheezing. you get tightness in the chest or throat. you have trouble breathing or talking.
Allergic reactions are sensitivities to substances called allergens that come into contact with the skin, nose, eyes, respiratory tract, and gastrointestinal tract.
They can be breathed into the lungs, swallowed, or injected.
The symptoms of an allergic reaction include.
Skin reactions, including hives and itching and flushed or pale skin.
Low blood pressure (hypotension)
Constriction of the airways and a swollen tongue or throat, which can cause wheezing and trouble breathing.
A weak and rapid pulse.
Nausea, vomiting or diarrhea.
Dizziness or fainting.
When you're allergic to something the allergic reaction usually begins within 10 to 24 hours after being exposed to the allergen.
Then when you do get the allergic reaction the allergic reaction typically lasts from 2 weeks to 4 weeks.
If the allergic reaction lasts longer than 4 weeks or the allergy symptoms start to get worse then you should see your doctor.
It might also be a good idea to see a doctor if the allergic reaction doesn't go away within a week just to be safe and make sure it's not something more serious.
But if it's not a deadly allergic reaction and just an allergic reaction to something such as pollen then the allergic reaction should go away within 1 to 4 weeks.
Sometimes my allergies go away within a week and sometimes they persist for 4 weeks.