Simple yeast infections are fairly simple to treat and a lot of people choose to buy over-the-counter medications to take care of their problem themselves. Most of the time the condition will respond very favorably with this approach and be eradicated in roughly seven days. This may work with the simple, basic yeast infections that healthy people have from time to time, but there are certain illnesses or medical conditions that will indicate that the infection could become more serious and, as a result, require medical intervention. Some groups of people who need to be especially prudent when they suspect a yeast infection are those with a weakened immune system, diabetics, and women who are pregnant. You need to consult with your medical doctor also if you have been getting yeast infections regularly over the past several months.