Infantile colic is a self-limiting condition characterized by periods of crying in otherwise healthy infants under 5 months of age. While the exact cause is unknown, potential contributors include immature gastrointestinal and central nervous systems, lactose intolerance, altered gut microflora, and behavioral factors. The main treatment is parental counseling and reassurance as the condition typically resolves by 3 months of age. Dietary interventions like lactase supplementation or probiotics containing Lactobacillus reuteri have shown benefits, but more research is still needed on effective management options.