Physiological Causes of Increased WBCs

Elevated WBC levels under normal, non-pathological conditions are often transient and reversible. Key factors include: Physical exertion: Intense exercise, heavy labor, or prolonged physical activity Pregnancy and childbirth: Elevated levels during late pregnancy, labor, and the postpartum period Emotional stress: Anxiety, fear, or extreme emotional fluctuations Environmental stimuli: Exposure to extreme temperatures (heat or cold), cold/hot showers, or ultraviolet (UV) light Dietary and lifestyle factors: Overeating, smoking, or circadian rhythm variations (e.g., higher levels in the afternoon) Physiological states: Menstruation, ovulation, or recovery from prolonged fasting