In certain cases, more severe systemic reactions (anaphylaxis) occurs which includes symptoms like difficulty breathing, rapid heart rate, hives, vomiting, diarrhoea, dizziness or loss of consciousness. It's important to note that the severity of the symptoms can vary depending on the individual's sensitivity and the number of bites or stings received. If you are concerned about a specific bite or sting or if symptoms persist or worsen, it is recommended to consult a healthcare professional for proper evaluation and treatment.