likely to be either spider mites or aphids. You can spray them down with a soapy water mixture of certain pesticideds... but wait to hear from someone else about what kinds of soap, ect. you should use
If they are little flys. You just want to let your soil dry out. What that will do is kill the larvae. Its a sign of over waterin some what because you are not lettin the soil dry out. Ya dont need any special treatment just let the soil dry out.