If you mean a 25+ herbal massage potli, the usual method is warm potli massage:

1. Prepare the potli: Put the dried herbal mixture into a clean cotton cloth and tie it tightly.
2. Warm it: Heat the potli using steam or by warming it with suitable massage oil. It should be comfortably warm, not hot.
3. Test the temperature on your wrist first to avoid burns.
4. Apply massage oil to the area if desired (sesame or coconut oil are commonly used).
5. Massage with the potli: Gently press, tap, and roll the warm potli over the muscles/joints for about 10–20 minutes.
6. Rewarm as needed while keeping the temperature comfortable.
7. Afterwards: Wipe away excess oil and keep the area warm and rested.

If you tell me whether you’re using it for body pain, knee pain, back pain, weight loss/body massage, or relaxation, I can give you the appropriate step-by-step method.