In this article, you will learn about contact dermatitis on the face, how to spot an allergic reaction, and when to seek medical attention.
What Are Allergies?
Allergies develop when your immune system misfires, triggering a reaction to everyday substances instead of viruses or bacteria. These reactions result from your body recognizing an allergen as a foreign and unwanted substance.
You can develop allergies to many different things, from pollens to pets. Some common allergens include:
Pollen Dust mites Molds Pets Certain foods Insects
Symptoms of Allergic Reaction
Allergic reactions can take many forms. Some allergy symptoms include sneezing, watery or puffy eyes, a red nose, and skin reactions ranging from redness to full-on hives.
Histamines help cells in the immune system communicate and start the process of defending your body against harmful substances such as germs or allergens. Unfortunately, histamines can also cause symptoms of allergies, or allergic reactions, such as runny nose, sneezing, red itchy skin or hives.
Your body’s inflammatory response to an allergen may begin with a rash that can progress to contact dermatitis or hives. Hives, or urticaria, can range from small to large red bumps that are very itchy and may become even worse if you scratch them.
In some cases (usually from skin exposure to an allergen), contact dermatitis may occur days, weeks or even months after the initial exposure. However, contact dermatitis from irritants like fragrances or chemicals is not considered an allergic reaction. This type of reaction usually appears with redness or rash but usually stops there.
Causes
Many foods, pollens, and medications can cause allergic reactions. Below are some of the most common allergens.
Other symptoms of anaphylaxis can include:
A warm sensation Flushing Red skin Itching Lightheadedness Anxiety Pain Cramping Vomiting Diarrhea
Animals and Insects
Allergies to animals or insects usually involve sensitivity to proteins found in animal skin cells (dander), saliva, and hair. Even when the animal isn’t around, these proteins can linger and trigger a reaction. You may also develop a response to things like pollen and dust on a pet’s fur.
Seasonal Allergies
Seasonal allergies can be caused by mold and pollens that tend to spike in numbers during certain times of the year. Some of the most common sources of seasonal allergies are:
Grass pollen (e. g. , bahia, bermuda, blue) Tree pollen (e. g. , cedar, oak, pine) Ragweed (e. g. , short, giant, western) Weeds (e. g. , burning bush, tumbleweed, lamb’s-quarters)
Some years may be worse for seasonal allergies, and things like wind and rainfall can also impact severity.
Food
You may be sensitive to many foods, but only a true allergy should trigger a visible reaction, such as a rash or hives on your face.
These eight foods make up about 90% of all food-related allergic reactions.
Eggs Milk or dairy Fish Shellfish Peanuts Tree nuts Soy Wheat
Medication
You can develop side effects or reactions to any medication, but several in particular are prone to triggering allergic reactions.
The most common medications associated with actual allergic reactions include:
Antibiotics, especially penicillins Aspirin Anti-inflammatory medications Opiate medications Some cancer drugs
Contact Dermatitis
Contact dermatitis (skin rash) can be caused by an irritant, an allergen, or both. Generally, skin rashes fall into one of two categories—irritant contact dermatitis and allergic contact dermatitis. It can be helpful to know what causes your reaction—allergy or irritant—since avoidance is the primary strategy for prevention.
Eczema
Eczema is a form of dermatitis called atopic dermatitis and is also triggered by an overreaction of the immune system. Similar to contact dermatitis, eczema can cause redness, itching, and the formation of a rash or small bumps. People with eczema often have several allergies, but triggers like fragrances in detergents, cold weather, and even some fabric types tend to be the most common.
When It’s an Emergency
Any severe allergic reaction is considered an emergency when accompanied by hives or anaphylaxis. Hives are often a sign of a more serious allergic reaction and are sometimes a red flag for anaphylaxis.
One way to tell whether it’s an allergic reaction is to pay attention to the timing and consistency of the reaction. Reactions that appear within about an hour after exposure to a specific food or substance are likely allergic in nature.
Anaphylaxis, on the other hand, disrupts breathing and can be fatal. If you have a history of anaphylactic reactions to allergens, you may want to make your close friends and family aware of your allergies and what you do to manage them.
Treatment
The best strategy for treating allergies is to avoid allergens. This requires allergy testing to pinpoint the exact allergens that could be triggering your reaction. Once you know your triggers, you can avoid them, but you should also have a plan to manage unforeseen exposures.
Medications to treat allergies include:
Antihistamines Steroids Anti-itch creams or ointments Immunotherapy
You and your healthcare provider should decide the best course of treatment based on your specific allergies and their severity.
Summary
Allergic reactions on the face can include skin rashes or redness, tiny bumps, or hives. The body’s production of antibodies causes these symptoms after exposure to allergens, such as animals, food, or pollen. Severe allergic reactions can bring about anaphylaxis (swelling of the mouth and throat), making it difficult to breathe.
The best way to treat allergies is to avoid specific triggers, which you can determine through allergy testing. However, you should always have a plan to manage allergies in case of exposure.
A Word From Verywell
Redness or itching on your face isn’t always a cause for alarm, but when caused by allergies, you need to be aware of your triggers and how to manage your symptoms. If you develop allergic reactions on your face, talk to your healthcare provider about what the cause may be and the best course of treatment.
