Allergic Reactions

What is an allergic reaction?

An allergic reaction occurs when your immune system overreacts to a substance it mistakenly identifies as harmful. These substances, called allergens,  may include foods, medications, insect stings, latex, or environmental triggers such as pollen or pet dander. Some reactions occur after direct contact, while others happen after eating, inhaling, or being injected with a substance.

When exposed to an allergen, your body releases chemicals like histamine. This immune response causes inflammation and leads to symptoms that can affect the skin, respiratory system, digestive tract, or cardiovascular system. The severity of a reaction varies from person to person and can even differ from one exposure to the next.

What are the symptoms of an allergic reaction?

Symptoms can range from mild to severe and may develop within minutes or hours after exposure. In some cases, symptoms appear quickly and intensify rapidly. Common signs include:

• Hives or itchy rash
• Redness or swelling of the skin
• Swelling of the lips, tongue, or throat
• Sneezing or nasal congestion
• Shortness of breath or wheezing
• Nausea, vomiting, or diarrhea
• Dizziness or fainting

Some individuals may also experience abdominal cramping, chest tightness, or a sudden feeling of anxiety. In severe cases, an allergic reaction can lead to anaphylaxis — a life-threatening condition that requires immediate medical attention.

When should I seek urgent care for an allergic reaction?

You should seek medical care right away if you experience:

• Difficulty breathing
• Throat tightness
• Rapid swelling
• Lightheadedness
• A widespread rash
• Symptoms that worsen quickly

If you have a known allergy and accidentally come into contact with a trigger, it’s important to monitor symptoms closely. Even if symptoms appear mild at first, they can escalate. Prompt evaluation ensures your safety and helps prevent complications.

How are allergic reactions treated?

At Express Lane Urgent Care, your provider performs a thorough assessment to determine the severity and likely cause of your reaction. Treatment may include:

• Antihistamines to reduce itching and swelling
• Corticosteroids to control inflammation
• Bronchodilators for breathing difficulty
• Epinephrine for severe reactions

Your provider will monitor your response to treatment and ensure symptoms are stabilizing before discharge. If needed, your provider may recommend follow-up testing or referral to an allergy specialist to identify triggers and prevent future reactions. You may also receive guidance on carrying emergency medications, such as an epinephrine auto-injector.

If you’re experiencing an allergic reaction, same-day and walk-in appointments are available. Visit Express Lane Urgent Care today, or schedule an appointment by phone or online.