Hello
At 3.5 months, a healthy baby should pass urine at least 6–8 times/day if adequately hydrated. Passing urine only 3–4 times/day may suggest mild dehydration, reduced intake, or concentrated urine. The fact that there is no straining, crying, or red tinge reduces the concern for UTI or obstruction.
Check if there is any ballooning of penis during passing urine
Next Steps
Monitor feeding: Ensure baby is feeding well at least 8–10 times/day.
Watch for signs of hydration: Baby should be active, have moist tongue, no sunken eyes, and soft fontanelle.
Check diaper output: At least 6 wet diapers/day indicates good hydration.
Track weight gain: Consistent growth on the growth chart is reassuring.
Observe urine stream: If it’s just a slow stream or unclear flow, you can try observing without diaper once.
Health Tips
Red flags:
If baby becomes lethargic, irritable, has fever, or feeds poorly.
If urine becomes reddish, has bad odor, or baby cries while urinating.
If urine output further reduces despite good feeding.