Bladder spasms are a common symptom of urinary tract infections or other bladder problems. They are characterized by sudden, involuntary contractions of the bladder muscles that can cause pain and difficulty urinating. Symptoms may include a frequent and urgent need to urinate, a burning sensation during urination, and abdominal pain. Bladder spasms can develop gradually over time or can be sudden and severe. Treatment typically involves antibiotics, pain medication, and lifestyle changes.