Maybe something in the food you are taking or the spicies added is not suiting you. Drinking very less water (less than 2-3 L), Sedentary lifestyle, smoking, alcohol, Stress, using synthetic pads/napkins etc can b a cause.
If you r married, then unhealthy sex can also lead to frequent UTI.
Next Steps
For proper Guidance, need to know the exact cause, symptoms, Doshas involved, your bodytype, lifestyle etc.