In rare cases, individuals allergic to bramble mason wasp stings or bites may experience more severe symptoms such as difficulty breathing, nausea, vomiting, and even anaphylactic shock. 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.