Welcome to icliniq.com. Based on the information provided, it seems that you may have hereditary angioedema or a severe allergy to red ants. I strongly recommend consulting an allergy specialist who can conduct patch testing and specialized blood testing to identify other potential allergens that could cause life-threatening reactions. In the meantime, it is important for you to obtain an EpiPen, which contains Epinephrine, as a rescue measure. Make sure to keep it with you at all times. In the event of an allergic reaction, administer the EpiPen to yourself and your children to potentially save lives. I offer my deepest condolences for your loss. The allergy specialist may be able to develop antisera, which can be administered slowly over a few weeks to help combat the allergy.