Symptoms may vary considerably and can be unbearable or so mild they are not even noticed.

This new identified condition can cause anaphylaxis, Gi pain, joint pain and make the plood pressure unstable.
Discover how HaT can impact people and how you can help raise awarness.
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Tryptase is one of many chemicals produced by mast cells. Researchers have recently identified people who make extra copies of the alpha tryptase gene. This is called Hereditary Alpha Tryptasemia (HaT). This genetic trait leads to increased levels of tryptase in the blood. Having extra copies of this gene may or may not cause symptoms
Some people with this genetic trait have symptoms similar to those in mastocytosis and MCAS, in particular, food intolerances with abdominal pain and diarrhea, as well as flushing and swelling of the skin and generalized aches and pains and dizzy spells. Some people with HaT are prone to anaphylaxis. This condition can usually be excluded if the tryptase level is less than 8 ng/ml. Because this condition is so recently identified there is still a lot to learn about what symptoms might be associated with it and how best to treat it.
People can have mastocytosis and HaT, both, or just have one.