Heart palpitations can be triggered by stress, exercise, medication or, rarely, a medical condition. Although heart palpitations can be worrisome, they're usually harmless. In rare cases, heart palpitations can be a symptom of a more serious heart condition, such as an irregular heartbeat (arrhythmia), that may require treatment. Symptoms.
Long-term exposure to radon can lead to lung cancer, the only cancer proven to be associated with inhaling radon. There has been a suggestion of increased risk of leukemia associated with radon exposure in adults and children; however, the evidence is not conclusive.
Breathing in high levels of radon over time can cause lung cancer. Anemia , a lack of red blood cells, can cause fatigue, pale skin and gums, brittle nails, irritability, and more. Carbon monoxide poisoning can be fatal, symptoms include headache, dizziness, nausea, and vomiting.