Birth control is one of the most damaging things you can put in your body specifically for your body s biological stress response. This is because birth control is linked to increased prefrontal brain activity when you re experiencing negative feelings or emotions. So on birth control, your brain spends more time capturing memories of stress, fear, worry, and trauma than it does on memories of happiness, joy, and contentment. Over time, that will disrupt your processing of those negative emotions which is impacting the way you respond to both minor and major stressors. Not only does birth control mess with the way that you handle stress, but there s also evidence for increased obesity.