[Trigger Warning]
A British student has shared her experience about a harrowing medical condition that leaves her at constant risk of a life-threatening allergic reaction, limiting her diet to only about 25 foods she considers safe. Kate Hegan, a 22-year-old teaching student from Somerset, lives in daily fear for her survival due to a rare disorder known as mast cell activation syndrome (MCAS). According to Hegan, the condition causes her body to react unpredictably not only to certain foods, but also to odors, temperature changes, and even hormonal fluctuations.
Living with the constant threat of severe allergic reactions has forced Hegan to face grim realities far beyond her years. Reflecting on the intense toll the condition takes, she explained: “Currently, I can only eat around 25 foods without my life being on the line and it’s not just food that my body reacts to; it’s even my own hormones, bodily processes, smells and temperature changes. Now, it’s our sofa – It’s absolutely terrifying, as when I go into anaphylaxis, I’ve got minutes before I’m dead.” She added that she has been forced to have open conversations with her parents about what to do when she dies, noting, “Spending each day worrying it might be my last isn’t so bizarre anymore.”
Diagnosed with MCAS just before turning 18, Hegan manages her condition with a demanding and expensive healthcare routine. She takes 15 medications daily and previously had to pay roughly £1,000 ($1,300) per month out of pocket for essential antibody injections, which were not funded through the NHS (National Health Service) where she lived. Because of how quickly anaphylaxis can strike, managing her day-to-day life safely requires an extraordinary level of vigilance.
Fortunately, Hegan found a lifesaving companion in Kenny, a four-year-old black Labrador trained by the charity Medical Detection Dogs. Kenny is trained to alert Hegan before severe allergic reactions, often giving her about a 10-minute warning before she develops anaphylaxis. Describing his behavior, Hegan said: “He paces up and down, does all the tricks he knows and just becomes very restless. Kenny will talk to me and if he’s really concerned, will let out a bark. He won’t take any touching, toys, treats or anything else while alerting. He really means business—especially when a reaction turns to anaphylaxis—and will give me a 10-minute warning so I can prepare. I get a proper Paddington-style stare from him.”
Hegan’s severe health challenges began in childhood with a series of unexplained and frightening medical issues. Growing up, she suffered from a squint, significant hearing loss that required surgery, a lack of bladder control, and a severe tendency to bruise. Most frighteningly, she began experiencing reflex anoxic seizures that caused her heart to stop for up to two minutes at a time, once suffering 24 such episodes in a single day.
The mystery surrounding her health left her family desperate for answers, leading to frequent accidents before she was properly diagnosed. “No one could find the problem. My mum stayed up Googling my symptoms for hours and began to connect the dots. After I fell down a flight of stairs and gave myself a concussion, along with a broken wrist, it was only a matter of time before I would have accidentally killed myself,” Hegan recalled. After a series of tests at Great Ormond Street Hospital, including a tilt-table test that caused her to immediately pass out, she was also diagnosed with postural orthostatic tachycardia syndrome (PoTS), which caused her heart rate to rise rapidly whenever she stood up.
The years of physical trauma and unanswered questions initially took a heavy psychological toll on Hegan, making her feel as though her future and her dream of becoming a nurse had completely vanished. However, the arrival of Kenny helped her regain her independence, return to university, and prepare to graduate as a primary school teacher. Expressing her profound gratitude for her canine companion, Hegan said, “If I could speak to him, I’d want to make sure he knew how invaluable he is. I’ve had reactions where, if it wasn’t for Kenny, I’d be dead. I couldn’t see the point in living anymore before he came to me. He’s shown me there is something to live for, and I will be around to find out what that is.”
We appreciate Ms Hegan sharing her experiences for the benefit of all and hope that medical breakthroughs on the horizon will soon help her return to a life with far fewer restrictions. Read more about MCAS at the American Academy of Allergy, Asthma & Immunology (AAAAI).
