Symptom Checker: Symptoms & Signs Index
Medical Reviewer: Melissa Conrad Stöppler, MD
Allergies are exaggerated immune responses to environmental triggers known referred to as allergens. Allergies are very common, and about 50 million people in North American suffer from allergies. One of the most common forms of allergy is allergic rhinitis ("hay fever"), which produces symptoms like nasal congestion, watery eyes, itching of the eyes and nose, sneezing, runny nose, scratchy throat, and throat clearing from postnasal drip. Other types of allergic reactions can involve the skin (hives and itching). Anaphylactic shock is a severe form of allergic reaction that can be life-threatening. In anaphylactic shock, there is swelling of the throat and difficulty breathing. Asthma is also related to allergies in many cases.
The symptoms of allergies can sometimes resemble those of other conditions. The common cold and the flu can cause respiratory symptoms similar to allergies. Typically, allergy symptoms are associated with a specific time of year or exposure to an allergen. This list focuses on allergies and other types of conditions that may cause some or many of the same symptoms as a cold.
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REFERENCE: WebMD.com. Allergy Types.
Main Article on Allergy
Causes of Allergy
In This ArticleAcute Bronchitis Article
- Acute bronchitis facts
- What is acute bronchitis?
- What causes acute bronchitis?
- What are the risk factors for acute bronchitis?
- What are the symptoms of acute bronchitis?
- When does a cold become acute bronchitis?
- How is acute bronchitis diagnosed?
- When should I call my doctor about my cough?
- What are the treatments for acute bronchitis?
- What are acute bronchitis home remedies?
- What are the complications of acute bronchitis?
In This ArticleAdenovirus 14 Article
- Adenovirus 14 (Ad14) facts
- What is the killer cold virus?
- What are symptoms and signs of an Adenovirus 14 infection?
- What causes an infection with Adenovirus 14 (Ad14)?
- How is an Adenovirus 14 infection diagnosed?
- What is the treatment for an Adenovirus 14 infection?
- What are complications of an Adenovirus 14 infection?
- What is the prognosis for an Adenovirus 14 infection?
- Can an Adenovirus 14 infection be prevented?
- Where can people get more information about the killer cold virus (Adenovirus 14)?
In This ArticleCommon Cold Article
- What is the common cold, and what causes it?
- How is the common cold transmitted?
- What are the symptoms and signs of the common cold in adults, children, and infants?
- Does it have anything to do with exposure to cold weather?
- What is the difference between the common cold and influenza (the flu)?
- How is the common cold diagnosed?
- What is the treatment for the common cold? Are there any home remedies for the common cold?
- Are antibiotics a suitable treatment for the common cold?
- When should a physician or other health-care practitioner be consulted?
- How do you prevent the common cold?
- Common Cold At A Glance
In This ArticleFlu (Influenza) Article
- Flu (influenza, conventional, and H1N1) facts
- What is influenza?
- What are the causes of the flu?
- What are flu symptoms in adults and in children?
- How is the flu diagnosed?
- What is the key to flu prevention?
- Are there any flu shot or nasal spray vaccine side effects in adults or in children?
- Why should the influenza vaccine be taken every year?
- What are some treatments an individual can do at home for the flu?
- When should a person go to the emergency department for the flu?
- Who should receive the flu vaccine, and who has the highest risk factors? When should someone get the flu shot?
- What is the prognosis (outlook) and complications for patients who get the flu?
- What is the bird (avian) flu?
- Do antiviral agents protect people from the flu?
- Is it safe to get a flu shot that contains thimerosal?
- Where can I find additional information about the flu?
- Flu (influenza, conventional, and H1N1) facts
In This ArticleFood Allergy Article
- Food allergy facts
- Introduction to food allergies
- How do allergic reactions to food occur?
- What are the symptoms and signs of food allergy?
- Do infants and children have problems with food allergy?
- What are the most common food allergies?
- What is cross-reactivity?
- What is oral allergy syndrome?
- What is exercise-induced food allergy?
- What conditions have mistakenly been attributed to food allergy?
- What conditions mimic food allergy?
- How is food allergy diagnosed?
- What is the treatment for a food allergy?
- Are allergy shots effective for food allergy?
In This ArticleInfectious Mononucleosis Article
- Infectious mononucleosis (mono) facts
- What is infectious mononucleosis?
- What is the cause of mono?
- What are risk factors for mono?
- How is mono transmitted or spread?
- What are the symptoms of mono?
- What are the signs of mono?
- How is mono diagnosed?
- What is the usual course and treatment of mono?
- What are the complications of mono?
- How can mono be prevented?
In This ArticleMeasles Article
- Measles facts
- What is measles?
- What is rubeola?
- What is rubella?
- What are other names for measles?
- What is the history of measles?
- What causes measles?
- How is measles spread?
- How does one become immune to measles?
- Who is at risk for getting measles?
- Is measles deadly?
- What is the danger of getting measles while pregnant?
- If I am exposed, how long does it take to develop symptoms and signs?
- What are measles symptoms and signs?
- What are the complications seen with measles?
- What is atypical measles?
- What is modified measles?
- How is the diagnosis of measles made?
- If it is not measles, what else could it be?
- What should I do if I have been exposed to measles?
- Is there any treatment for measles after symptoms and signs develop?
- If measles only rarely occurs in the United States, why should I get vaccinated?
- Do I need to be revaccinated against measles if I am traveling to Europe?
- What is the prognosis for measles?
- How can I prevent contracting measles?
- Is there any truth to the fear of getting autism from vaccines?
- Who should not receive measles vaccinations?
- If a child has an egg allergy, can they still receive the measles vaccine?
- What adverse reactions can occur to the measles vaccination?
- Who should be revaccinated against measles?
- Where can I find more information about measles?
In This ArticlePink Eye Article
- Pink eye facts
- What is "pink eye"?
- What infections cause pink eye, what are infectious pink eye symptoms, and how are they treated?
- What noninfectious conditions cause pink eye, what are noninfectious pink eye symptoms, and how are they treated?
- What are home treatments and care for pink eye?
- How can I prevent the spread of pink eye?
In This ArticlePoison Ivy Article
- Poison ivy, oak, and sumac facts
- What causes the rash? How do I identify poison ivy, oak, and sumac?
- What are the signs and symptoms of the poison ivy rash?
- Is a rash from poison ivy, oak, and sumac dermatitis contagious?
- What are risk factors for poison ivy, oak, and sumac dermatitis?
- How is the dermatitis of poison ivy, oak, and sumac diagnosed?
- What is the treatment for poison ivy, oak, and sumac dermatitis?
- What are complications for poison ivy, oak, and sumac dermatitis?
- What is the prognosis (outlook) for poison ivy, oak, and sumac dermatitis?
- How can contact with poison ivy, oak, and sumac be prevented?
- What should people do if they are exposed to a poisonous plant?
In This ArticleRespiratory Syncytial Virus Article
- Respiratory syncytial virus (RSV) infection facts
- What is the respiratory syncytial virus (RSV)?
- When does RSV infection occur, and who gets it?
- Who is at risk for severe disease?
- Is RSV infection contagious, and how is RSV infection transmitted?
- What are the symptoms of RSV infection?
- How is RSV infection diagnosed?
- What is the treatment for an RSV infection?
- How can RSV infection be prevented?
- Is there an RSV vaccine?
- What is the prognosis of a respiratory syncytial virus infection?
In This ArticleSinus Infection Article
- Sinus infection facts
- What is a sinus?
- What is a sinus infection?
- What causes sinus infections?
- What are the types of sinusitis?
- What are the signs and symptoms of sinus infection?
- How is sinus infection diagnosed?
- How is sinus infection treated?
- Are there home remedies for a sinus infection?
- What are complications of sinus infection?
- Can sinus infection be prevented?
- Related sinus infection article:
Sinus infection - on eMedicineHealth
In This ArticleSmoking (How to Quit Smoking) Article
- Smoking and quitting smoking facts
- What problems are caused by smoking?
- What is addictive disease and why is smoking considered addictive?
- What are the signs of cigarette addiction?
- Why should someone quit smoking?
- What are the steps in quitting?
- Getting ready to quit smoking
- On the day you quit smoking
- Staying quit
- What methods can help a person quit smoking?
- Behavioral modification and self-help literature to quit smoking
- Nicotine replacement therapy to quit smoking
- What prescription products are available for smoking cessation?
- How are nicotine-containing products used safely?
- What is in the future for smoking?
In This ArticleSmoking During Pregnancy Article
- Smoking during pregnancy introduction
- How does secondhand smoke affect pregnancy?
- How Can I Quit Smoking Before or During Pregnancy?
- Can I use a nicotine replacement during pregnancy?
- How will I feel when I quit smoking during pregnancy?
In This ArticleStrep Throat Article
- Strep throat facts
- What is strep throat?
- What causes a sore throat?
- What are tonsils and tonsillitis?
- What are pharynx and pharyngitis?
- Viral causes of throat infection
- Bacterial causes of throat infection
- How common is strep throat?
- Is strep throat contagious?
- What are the signs and symptoms of strep throat?
- Are strep throat symptoms different in children compared to adults?
- When should I be concerned about a possible strep throat?
- How is strep throat diagnosed?
- Who should be tested for strep throat?
- How is strep infection treated?
- How can viral throat infection be treated?
- Are there any recommended strep throat remedies and symptom reducers?
- When should the tonsils be removed?
- Why is it very important to detect and treat a strep throat?
- What are the potential complications of untreated strep throat infection?
- Is there a vaccine for strep throat?
- Can strep throat be prevented?
In This ArticleWhooping Cough (Pertussis) Article
- Whooping cough (pertussis) facts
- What is whooping cough? What is the history of whooping cough?
- What causes whooping cough?
- What are risk factors for whooping cough?
- Can whooping cough be prevented with a vaccine?
- What are whooping cough symptoms, signs, and stages?
- How is whooping cough transmitted?
- Can adults get whooping cough?
- How is whooping cough diagnosed?
- What is the treatment for whooping cough?
- What is the prognosis for whooping cough?
- What are possible complications of whooping cough?
- Where can people find more information about whooping cough (pertussis)?
Other Causes of Allergy
- Food intolerance
- Viral infections
- Bacterial infections
- Coronavirus infection
- Parainfluenza virus infection
- Nasal polyps
- Drug abuse or addiction
- Consuming spicy foods
- Air pollution
Examples of Medications for Allergy
Symptoms & Signs A-Z List
Allergies & Asthma
Improve treatments & prevent attacks.