What Causes Urinary Incontinence Post Urination?

My 8 year old daughter (who s never had any issues with accidents since being potty trained before 3 years old) has recently started saying that she is dripping or leaking urine, usually shortly after urinating. She started telling me when I noticed her pants being slightly wet a week ago. She doesn t have trouble with regular bowel movements, no history of urinary tract infections. She says this problem has been happening for a long time .