A nightshade allergy is a rare type of food allergy caused by glycoalkaloids, a compound naturally produced by all nightshade plants. Nightshade vegetables include tomatoes, eggplants, and bell peppers, and people with a nightshade allergy may develop breathing problems, a rash, or eczema shortly after eating certain vegetables. Symptoms of a nightshade allergy can also include itchiness or rash, nasal congestion, wheezing or difficulty breathing, nausea or vomiting. If a nightshade allergy is severe and causes any of the signs of anaphylaxis, individuals should seek emergency treatment immediately.
It is important to note that a nightshade intolerance or sensitivity means the foods are not digested properly, which can cause a range of symptoms, including digestive issues. Symptoms of a nightshade sensitivity can include acne, bloating, brain fog, diarrhea, fatigue, gas, heartburn, hives, joint pain or swelling, migraines, nausea, and other gastrointestinal issues.
If you suspect any kind of food allergy, including a nightshade allergy, you should contact your healthcare provider immediately as this is a severe reaction and can result in anaphylaxis, a potentially life-threatening allergic reaction that can occur in seconds or minutes of exposure. A doctor can help diagnose a nightshade allergy in the same way as other allergies, using several diagnostic tests, such as a skin prick test or a blood test.
