Will a fungal infection on the skin stop me from going on my vacation?

Not usually. An anti fungal crieam should help cure the infection.
Depends. A fungal infection in the blood would definately put a nix (permethrin) on travel as u would be quite ill.On the skin, this is more a nuscience like poison ivy than anything & simple treatment is available.I wouldn't put myself in quarintine for this either.Cary your meds with you and have a good time.