Just be aware, if you have not read some past posts on the forum that the electric signal produced by a zapper will not reach all parts of the body, and it is poorly efficient to kill big parasitic worms (it may help to kill tiny worms, not sure), so if you use a zapper and the worms are not killed and move to others parts of the body where there is less current (in the head for example...), it can increase the irritation, the damage, the inflamation, and consequently the pressure in these areas.