Tiruvannamalai is relatively safer than some other parts of India, but precautions should be taken. It sees a lot of tourists, including solo female travelers because of its spirituality and serene nature. Nevertheless, it is advisable to be cautious especially at night and avoid isolated areas. Most locals are friendly and helpful or indifferent. However, it's crucial to dress modestly respecting the local culture, be careful while dealing with strangers, and avoid travelling alone during late hours.