Hi, thanks for using healthcare magic
Any area of the body would swell in response to trauma. This is due to the release of various chemicals in the blood stream that cause increase fluid in the tissue spaces.
The swelling is as a result of trauma to the
clitoris. The degree of swelling would depend on the extent of force used and any trauma that occurs.
If the stimulation is mild then it is quite likely that no swelling would occur.
I hope this helps