The medical term for frequently waking up at night to urinate is nocturia. Broadly, this may be because of excessive urine production in general (poorly controlled diabetes mellitus, diabetes insipidus), excessive urine production only at night (congestive heart failure, obstructive sleep apnea, certain drugs), inability to empty the bladder (prostate enlargement) or inability to fully fill the bladder (bladder overactivity, bladder inflammation).
A consultation with a urology doctor will help diagnose the cause and set you on the path toward a more restful night. Untreated nocturia is associated with a poorer quality of life and can lead to depression, cognitive dysfunction, and increased risk for falls and fractures.