Methods: Fifteen women participated in the study voluntarily. They have first to fill in the form of Visual Analogue Scale (VAS) for pain. Then the pulse of the subjects were measured by ANSWatch before and after acupuncture. All meridians can be assessed by analyzing the pulse spectra through Fast Fourier Transform (FFT) of the original pulse data. The significant change of amplitude in certain harmonics which corresponds to a specific meridian after acupuncture treatment can be selected out.