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(HealthDay News) - Allergic reactions can range from very mild to life-threatening. Severe allergic reactions require immediate medical attention, but even reactions that are milder should be checked out by a doctor.

Here are warning signs of a mild allergic reaction, courtesy of the U.S. National Library of Medicine:

• Skin rash.
• Hives, especially on the neck or the face.
• Itchy skin.
• Red or watery eyes.
• Nasal congestion.

If you have more serious symptoms of an allergic reaction, including difficulty breathing, swelling, dizziness, chest discomfort, abdominal pain, or feelings of apprehension and anxiety, seek medical attention as soon as possible.