Niggles can be defined as minor irritations or discomforts that take away our peace of mind. The good news is that there are plenty of synonyms available to help us describe these pesky problems. A few of the most popular options include grievances, annoyances, hiccups, hassles, and snags. Other possibilities include peeves, vexations, inconveniences, and frustrations. Each of these terms conveys a slightly different nuance or level of intensity, so it's important to choose the right synonym for the context. Whether we're dealing with a small nuisance or a more significant issue, there's a word out there to capture the essence of the problem.