Is it possible for a 3-4 months old infant to develop gout? diagnosis was based on presence of urine crystals in diaper. no family history of gout.

Unlikely.: Gout crystals need a microscope to b seen. Some sources say that if crystals persist for 4-5 days, infant may be dehydrated. Large white crystals found in diapers that r visible to naked eye r a product of the chemical that makes modern diapers “super-absorbent:” sodium polyacrylate. These polymer beads can leak out of lining if diaper very full or torn.

I suppose...: Anything is possible, but it's highly unlikely that it's related to gout. See a pediatric endocrinologist if you need a definitive diagnosis.

Normal baby pee: Urine is composed of water and the material that results from the breakdown of protein and other nutrients during metabolism.These can occasionally be seen as crystals in the diaper, and may be clear or have a rust like color.