A C section does not cause sensory processing disorder. And yet claims like this spread because they sound just scientific enough and often tap into guilt or birth trauma. Let’s talk about what actually matters. Sensory processing differences affect how the brain handles input like sound, touch, movement, light, and even body signals. For some kids, a shirt tag feels unbearable. For others, their body is constantly seeking motion just to feel settled. This can look like: Big reactions to noise,