I can only pee a little bit at a time. Why?

May be going too oft. Need to train your bladder by learning to hold it for timed intervals .
Needs to be checked. We can not say why you only pee a little bit,without a detailed history as to how long,any pain or burning,any other associated symptoms.Past History.Are you taking any pescribd meds or street drugs.About your sexual History etc.I suggest you make an appointment with your doctor to find the cause and appropriate treatment if you need any.