Hello
The image appears to be mild erythema with small papules in the diaper area and adjoining folds, suggestive of mild irritant diaper dermatitis or early intertrigo, common in infants due to moisture, heat, and friction.
The rash is most likely due to skin irritation from prolonged contact with urine, stool, and friction in skin folds. It is common in infants and usually not serious.
Next Steps
Frequent diaper changes: Change diapers every 2–3 hours or when wet/soiled.
Air drying: Leave the diaper off for some time each day to allow the skin to breathe.
Gentle cleansing: Clean the area with lukewarm water and soft cloth. Avoid wipes with alcohol/fragrance.
Apply a barrier cream like zinc oxide (10–20%) after every diaper change.
If there’s any fungal overgrowth (if rash becomes bright red with satellite lesions), consider an antifungal cream like clotrimazole twice daily for 5–7 days after consulting a doctor.
Health Tips
Avoid Talcum powder (can irritate lungs if inhaled), Tight-fitting diapers or synthetic clothing.
Visit a Pediatrician if rash worsens, becomes painful, oozes pus, or is associated with fever.