Minecraft – How to delete the effect particle when summoning a mob

XD, YD, and ZD usually mean the difference in X, Y, and Z that the particles can appear in from the coordinates that you gave. This means that rather than all being summoned at an exact point, the particles can cover an area.

For example, /particle smoke ~ ~ ~ 10 0 0 0 100 will create a long line of particles along the X axis. /particle smoke ~ ~ ~ 1 1 1 0 100 will create a small box.

This does not affect the movement of individual particles though, you most likely want the <speed> argument. If you make this 0, the particles should not move as much. Keep in mind though that many particles inherently have some small movement that is unavoidable.

You can make a command block that makes the player execute the command.

Syntax:

/execute <x> <y> <z> detect <x2> <y2> <z2> <block> <data> <command …>
/execute <entity> <command …>

So, you could try making the player execute the sweating instead.
Presume your player has a score that deduces his temperature (call it temperature), and we want him to sweat if it's above 35.

Run this command on a loop:

/execute @a[score_temperature_min=35] particle dripWater ~ ~1 ~ 0.2 0.25 0.15 12 1 @p