The most common signs of allergic reactions include cough, difficulty or irregular breathing, wheezing (whenever you breathe in), itchy throat/mouth, and difficulty swallowing. In addition to these symptoms that are related directly to your lungs being affected by something else like dust mites, for example – there could also be other more systemic effects such as nausea, vomiting, abdominal pain, diarrhea, etc. The final insult would lead towards hives on the skin, which we call “an eighth shape” because it’s so unique!