Luang Namtha is generally safe for solo female travelers. Like any place, it has its risks, but they are minimal. The locals are friendly and willing to help. The most common issues are minor like bag snatching and occasional scams. It's important to be alert but there's no need for excessive worry. Just practice common travel safety precautions such as avoiding unlit and less populated areas at night and take precautions with your belongings. Always trust your intuition.