Causes of sudden allergies can be as follows:

 

What to do if you have ealargy?

Allergy symptoms

Allergy symptoms can vary from person to person and depending on the type of allergen. Some common symptoms are as follows:

1. Respiratory symptoms:
Sneezing

Congested nose or runny nose

Coughing

Shortness of breath or wheezing

Itchy or irritated throat

2. Eye symptoms:
Red eyes

Itchy or irritated eyes

Watery eyes

Swollen eyes

3. Skin symptoms:
Itching

Rash or rash

Eczema

Swollen skin or urticaria (hives)

4. Digestive symptoms:
Abdominal pain

Nausea or vomiting

Diarrhea

Swelling of the face or throat

5. General symptoms:
Headache

Fatigue

Fever (rare)

6. Severe symptoms (anaphylaxis):
Swelling of the airways

Sudden drop in blood pressure

Rapid heart rate

Fainting

When to see a doctor?
If allergy symptoms are severe, such as difficulty breathing, swelling of the face or throat, or signs of anaphylaxis, seek medical attention immediately.

Antihistamines, decongestants, or other medications may be used to control allergies, but measures should be taken as directed by a doctor.

Causes of sudden allergies can be as follows:

1. Environmental factors:

Exposure to dust, pollen, animal dander, or mold.

Exposure to pollution or smoke.

2. Food:

Certain foods, such as nuts, eggs, milk, fish, or wheat.

Chemicals or preservatives in food.

3. Medications:

A reaction to penicillin, aspirin, or other medications.

4. Insect stings:

Allergic reactions to bee, fly, or ant stings.

5. Heat or cold:

Exposure to extremely hot or cold weather.

6. Stress:

Excessive stress or anxiety can increase allergy symptoms.

7. Genetic factors:

A family history of allergies can lead to sudden allergies.

8. Other causes:

Exposure to chemicals, scents, or cosmetics.

Sudden allergic symptoms may include itching, swelling, rash, difficulty breathing, or headache. If symptoms are severe, seek medical attention immediately.