As long as it doesn't get infected, you'll be fine. If it gets infected, it could get swollen or itchy. We all know the dangers of an itchy trigger finger....
"The nation that will insist on drawing a broad line of demarcation between the fighting man and the thinking man is liable to have its fighting done by fools and its thinking done by cowards." - Sir William Francis Butler
While dry firing a heavy trigger will certainly be helpful for working on trigger control, dry firing a heavy trigger and carrying a lighter one should be done with caution. If you are used to the heavier trigger and then need to use your carry gun, you may go through the trigger's travel too quickly and fire a round before you intended.
If you want to maintain proficiency with both guns, it is a good idea to end each dry fire session with your carry gun to acclimate your brain to the trigger.