Fungi tend to thrive in warm, moist environments, and many strains do exceptionally well in human skin. The rash will appear to be a pale area surrounded by a slightly puffy, reddish border. Again, the solution to clearing up fungal infections is fairly straightforward. Avoid scratching the rash, because bacteria do quite well in the already-compromised area of a fungal infection. Bacterial infection is an altogether nastier situation requiring antibiotics.
Skin infections A skin infection is a much more serious proposition than all of the above.
Beginning at an inadequately cleansed break in the skin, such as a cut or scrape, the infection will look like a series of reddish tracks, usually growing away from the cut. You will also feel a sensation of heat in the cut and probably notice swollen glands under your armpits or inner thighs. All of these are a dead giveaway for infection that must be taken seriously. Get to a doctor. They will probably prescribe a course of antibiotics such as cloxacillin or penicillin.