Checking OCD — Compulsive Checking of Locks, Gas, and Safety

Checking OCD is among the most practically disruptive OCD subtypes. Compulsive checking of door locks, windows, the gas hob, electrical appliances, and other safety-related items can consume hours of the morning and evening, make leaving the house a prolonged and exhausting ritual, and destroy confidence in one's own perceptions and memories. The checking is driven not by genuine carelessness but by a sensitised amygdala that interprets any unverified risk as catastrophic.

What Drives Checking OCD

The checking OCD cycle begins with an intrusive 'what if' thought (What if I left the gas on? What if the door is unlocked?) that triggers anxiety. The person checks — and finds everything normal. For a few minutes, anxiety reduces. Then the doubt returns: 'But did I really check? What if I didn't notice something?' The checking begins again. The key insight is that checking never resolves the doubt — it teaches the amygdala that checking is the appropriate response to the thought, making the doubt more frequent.

Common Checking OCD Behaviours

• Checking door and window locks — multiple times, sometimes in specific sequence
• Checking the gas hob — physically touching each knob or filming it for proof
• Checking electrical appliances — unplugging everything before leaving
• Returning home multiple times after leaving to re-check
• Filming security checks to watch back when doubt occurs
• Recruiting family members to confirm checks have been done
• Mental checking — reviewing the check in the mind, looking for gaps
• Driving back to check if something was left behind, or if someone was run over

Recovery from Checking OCD

The Linden Method produces recovery from checking OCD by recalibrating the amygdala — reducing the alarm signals that generate the 'what if' thoughts and the compulsion to resolve them through checking. As the alarm system settles, the 'what if' thoughts diminish in frequency and urgency, the compulsion to check reduces, and the person is able to leave their home without the ritual that has occupied so much of their life.