Allergic Reactions

Symptoms

• Hives and itching: Raised, itchy welts or widespread itchy skin, often the first visible sign of a reaction.
• Swelling (angioedema): Puffiness of the lips, eyelids, face, hands, or feet; swelling of the tongue or throat is a red flag.
• Trouble breathing: Wheezing, shortness of breath, chest tightness, or a hoarse voice suggest the airway is involved.
• Nasal and eye symptoms: Sneezing, runny nose, and itchy, watery, or red eyes, common in mild environmental or seasonal allergies.
• Stomach symptoms: Nausea, vomiting, cramping, or diarrhea, which can accompany a food or drug allergy.
• Dizziness or fainting: Lightheadedness, a rapid or weak pulse, or a sense of impending doom can signal a dangerous drop in blood pressure.

When It's an Emergency

Call 911 or go to the nearest emergency room immediately for signs of anaphylaxis, a severe, potentially fatal allergic reaction. Warning signs include difficulty breathing or wheezing, swelling of the tongue, lips, or throat, tightness in the chest or throat, a hoarse voice or trouble swallowing, a fast or weak pulse, dizziness or fainting, or a sudden feeling of doom.

Anaphylaxis often involves two or more body systems at once — for example, hives plus vomiting, or facial swelling plus lightheadedness. If you have a prescribed epinephrine auto-injector (EpiPen), use it at the first sign of a severe reaction and then call 911, even if you start to feel better. Symptoms can return in a second wave hours later.

Seek emergency care for a reaction after a known trigger such as a bee sting, a food like peanuts or shellfish, or a new medication when symptoms are spreading quickly. Do not wait to see whether symptoms improve on their own, and do not drive yourself if you feel faint or short of breath.

Bellaire ER treats severe allergic reactions and anaphylaxis on-site 24/7 with epinephrine and monitoring, and arranges hospital transfer in the rare case admission is required.

When It's Not an Emergency

Many mild allergic reactions do not require an emergency room. Localized itching, a few hives, mild seasonal sneezing, or a small area of skin redness can often be managed at home with an over-the-counter antihistamine and by avoiding the trigger.

Telemedicine or an urgent care visit is reasonable when symptoms are mild, stable, and limited to one part of the body, with no breathing trouble, no facial or throat swelling, and no dizziness. A clinician can help identify the trigger, recommend medication, and advise on when an allergy specialist referral makes sense.

When symptoms are worsening, spreading, or you are unsure how serious a reaction is, choose the emergency room. Allergic reactions can escalate quickly, and it is always safer to be evaluated in person if the airway, breathing, or blood pressure may be involved.

What Happens at Bellaire ER

When you arrive at Bellaire ER with an allergic reaction, a board-certified emergency physician evaluates you quickly and checks your airway, breathing, and vital signs first. Severe reactions are treated right away, typically with epinephrine, and may also include antihistamines, corticosteroids, IV fluids, and oxygen as needed.

We monitor you for several hours when appropriate, because anaphylaxis can return in a delayed second wave after initial treatment. Our on-site lab and imaging — X-ray, CT, and ultrasound — are available if your physician needs to rule out other causes or complications.

Most patients are diagnosed and treated in a single visit without a hospital transfer. Before you leave, your physician explains what happened, may prescribe an epinephrine auto-injector, and gives you a clear plan for avoiding the trigger and following up.

Prevention

The most reliable way to prevent allergic reactions is to identify and avoid your known triggers, whether they are foods, medications, insect stings, latex, or environmental allergens. Read food and product labels carefully and tell every healthcare provider about your allergies.

If you have had a severe reaction, ask your doctor about carrying a prescribed epinephrine auto-injector and keeping it with you at all times. Wearing a medical alert bracelet and having a written allergy action plan can help others respond quickly in an emergency. An allergist can also offer testing and, for some allergies, long-term treatments such as immunotherapy.