Have you used an epinephrine shot to treat an allergic reaction?

Have you been accidentally stuck with an epinephrine shot?

If you have answered "No" to the above questions, go back to Check Your Symptoms and continue to answer the questions to evaluate your symptoms.

Have hives appeared suddenly (within the past 1 to 3 hours) and now cover all or most of your body?

Do you have swelling in your mouth or throat?

Do you have hives that appeared over several hours today and cover all or most of your body, but you are not having other symptoms?

Do you still have hives, without other symptoms, after 24 hours of home treatment?

If you have answered "No" to the above questions, go back to Check Your Symptoms and continue to answer the questions to evaluate your symptoms.

Is new mild difficulty breathing getting worse?

Did wheezing begin after you took a medicine?

Do you feel short of breath, even when you are resting, but you can still speak in short sentences?

Do you have mild wheezing, even at rest, but you do not feel short of breath and can still speak in complete sentences?

Have you had mild shortness of breath for the past 24 hours?

Have you had ongoing (chronic) mild breathing problems that have slowly gotten worse over the past 24 hours?

If you have answered "No" to the above questions, go back to Check Your Symptoms and continue to answer the questions to evaluate your symptoms.

Do you have swelling of your tongue or throat but you are not having breathing problems?

Is swelling near your lips or on your face causing mild breathing problems?

Do you have swelling of your face, eyelids, or ears?

Do you have swelling in your mouth or throat?

Do you have major swelling across two large joints, such as from below the ankle to above the knee or from below the elbow to above the shoulder?

Do you have swelling of the palms of your hands or the soles of your feet?

Has swelling slowly gotten worse or not gotten better during the past 24 hours but you are not having any other problems?

If you have answered "No" to the above questions, go back to Check Your Symptoms and continue to answer the questions to evaluate your symptoms.

Do you have diabetes?

Do you have peripheral arterial disease?

Do you have a disease or take a medicine that causes problems with your immune system?

Do you have red streaks extending from the rash?

Do you have increased pain, swelling, redness, or warmth around a rash?

Is the area around your rash increasingly tender to the touch?

Do you have pus in or around the rash?

Do you know or think you have a fever?

Have you had mild pain and swelling with redness less than around a wound for 24 hours or longer?

Have you had painful, swollen glands (lymph nodes) near a wound for 24 hours or longer?

If you have answered "No" to the above questions, go back to Check Your Symptoms and continue to answer the questions to evaluate your symptoms.

Do you think your symptoms may be caused by a medicine?Note: If your answer is "Yes ":Call the doctor who prescribed the medicine the same day (before your next dose) to determine whether you should stop taking the medicine or take a different one. An appointment may not be necessary.If you are taking a nonprescription medicine, stop taking it. If you feel you need to continue taking the medicine, call your doctor.

If you have answered "No" to the above questions, go back to Check Your Symptoms and continue to answer the questions to evaluate your symptoms.

Is severe itching interfering with your usual activities or preventing sleep?

Do you have severe itching that is not improving after 12 hours of home treatment?

Do you have moderate itching after 48 hours of home treatment?

Do you have mild, steady itching after 1 week of home treatment?

Have you had mild itching off and on for 4 weeks or longer?

If you have answered "No" to the above questions, go back to Check Your Symptoms and continue to answer the questions to evaluate your symptoms.

Do you have hay fever symptoms that have not gotten better after 2 weeks of home treatment? Hay fever symptoms can include: Itchy, watery eyes.Sneezing.Runny, stuffy, or itchy nose.Temporary loss of smell.Headache and fatigue.Dark circles under the eyes.Mucus draining from the nose down the back of the throat (postnasal drip).

If you have answered "No" to the above questions, go back to Check Your Symptoms and continue to answer the questions to evaluate your symptoms.

You have answered "Yes" to a question that indicates you may need immediate care. Call your health professional now to discuss your symptoms and arrange for your care.

• Symptoms are likely to worsen without medical care.
• If you do not have a health professional, seek emergency care.
• Emergency transportation is not needed. However, if you are not able to travel safely either by driving yourself or having someone else drive you, call an ambulance.

You do not need to answer any of the other questions.

You have answered "Yes" to a question that indicates you need to call your health professional to discuss your symptoms and arrange for care.

• An appointment today is usually needed.
• Symptoms are unlikely to improve without medical care.

Return to the Check Your Symptoms section and answer the questions. You may need to see a health professional sooner if you have other more serious symptoms.

You have answered "Yes" to a question that indicates you may wait to see if your symptoms improve over the next 24 hours (or the specified time period). If symptoms improve, no appointment is needed.

• If symptoms do not improve after 24 hours (or the specified time period), an appointment within the next 24 hours is usually needed.
• If appropriate, try home treatment to relieve your symptoms.
• Check your symptoms in 24 hours, or sooner if there is any change.
• Call your health professional if symptoms get worse.

Return to the Check Your Symptoms section and answer the questions. You may need to see a health professional sooner if you have other more serious symptoms.