I have been diagnosed with POTS for about a year now, and keep experiencing 'flare ups'. When I have an episode I get major heart palpitations, very hot and extremely lightheaded. It is a very distressing thing when they happen and they happen without any warning signs. A few of them have happened during light exercise and others just out of nowhere. It's made me so cautious of doing any strenuous activities, in fear of one happening again. Has anyone else experienced this? If so, what has helped prevent them/deal with them when they are happening? Thank you xxx