Large, painful bumps on a child’s forehead that appear every summer may be linked to sweat, heat, and bacterial overgrowth. In hot weather, excessive sweating can weaken the skin barrier and allow bacteria to enter sweat glands, leading to red, tender, pus-filled bumps. This video explains why children may be more prone to such summer skin infections and what parents can do to reduce flare-ups. Gentle cleansing twice daily with a pH-balanced cleanser may help keep sweat, oil, and bacteria under control. Light cotton clothing, cool showers, well-ventilated spaces, and fragrance-free non-comedogenic powder can also reduce sweat buildup. Hydration through water and water-rich fruits can support body temperature regulation during summer. If the bumps persist, become very painful, or keep returning, a dermatologist may recommend topical antimicrobials or oral antibiotics for proper treatment.