Yes, Sitaram Nirgundyadi Thailam can be used on sore muscles after exercise. It is an Ayurvedic oil traditionally used for its anti-inflammatory and analgesic properties, which may help in relieving muscle soreness and promoting relaxation. To use, gently massage the oil onto the affected areas in circular motions. It's best to leave it on for at least 30 minutes before washing off for optimal results. However, if you have sensitive skin or any concerns, it's a good idea to perform a patch test before full application.