Feeling that the bladder is very full but only a little bit of urine, consider with cystitis, bladder stones, overactive bladder syndrome and other diseases, you can go to the hospital in time for further examination to clarify the cause of the disease, and then timely consultation. 1. Cystitis: generally due to bladder inflammation stimulation, resulting in damage to the bladder mucosa, and then appear to feel the bladder is very full but only a little bit of the phenomenon of urine, cystitis may appear frequent urination, urinary urgency, urinary pain and other symptoms. 2. Bladder stones: usually due to the bladder stones in the bladder caused by the bladder to enhance the sense of irritation, so that the human body feel the urge to urinate, and then appear to feel the bladder is very full but only a little bit of the phenomenon, and there will be pain, hematuria and other symptoms. 3. Excessive bladder syndrome: it may be due to excessive contraction of the bladder muscle, irritating the bladder, which in turn causes the phenomenon of feeling the bladder is very full but only a little bit of urine, excessive bladder syndrome will generally appear frequent urination, urinary urgency, urinary incontinence and other symptoms. If the phenomenon of feeling the bladder is very full but only a little bit of urine, you need to go to the hospital in time to avoid adverse consequences.