Individually Targeted Neuromodulation for Contamination-based OCD

This study tests a brain stimulation approach called transcranial magnetic stimulation (TMS) — a non-invasive technique that uses magnetic pulses to stimulate specific brain areas — to treat a specific type of OCD focused on contamination fears (e.g., fear of germs, dirt, or illness). **You may be eligible if...** - You are 18–55 years old with a diagnosis of OCD - Your main OCD symptom is contamination-related fears - You score 8 or higher on the contamination subscale of a standard OCD rating scale - You are either not on psychiatric medication, or have been on a stable dose for at least 4 weeks **You may NOT be eligible if...** - Your main OCD symptoms are something other than contamination (e.g., harm, hoarding, symmetry) - You have metal implants in your head or a history of seizures (safety concern for TMS) - You have a recent history of substance abuse or are actively suicidal - You are pregnant Talk to your doctor to see if this trial is right for you.