These are some resources I recommend. Some of the below I benefited personally from and their content has informed this guide.
David J. Keuler, PhD. When Automatic Bodily Processes Become Conscious: How to Disengage from “Sensorimotor Obsessions” https://iocdf.org/expert-opinions/when-automatic-bodily-processes-become-conscious-how-to-disengage-from-sensorimotor-obsessions/
The above is a classic and gives a really nice overview of what SOCD is.
Dr Seay’s series of posts on the topic.
Part 1: http://www.steveseay.com/sensorimotor-body-focused-obsessions-ocd/
Part 2: http://www.steveseay.com/ocd-core-fears-body-focused-obsessions-compulsions/
Part 3: http://www.steveseay.com/treatment-body-focused-obsessions-ocd/
This is very detailed and he makes many good points. On the third post, you can actually see my posts from way back in 2012, when I was struggling myself and asking Dr Seay questions!
Hershfield & Corboy, The Mindfulness Workbook for OCD, Ch 14 – Hyperawareness OCD
This chapter on hyperawareness OCD covers more than just body-focused obsessions, although the principles are generally the same. Some good coverage of common thought patterns, triggers and obsessions.
Dr Michael Greenberg’s articles:
https://drmichaeljgreenberg.com/how-to-stop-paying-attention/
https://drmichaeljgreenberg.com/how-to-stop-ruminating/
The above are fantastic articles (along with others on his website). He introduces the difference between awareness and attention, which is key for people with SOCD, so they can understand what they can control (attention) and what they can’t (awareness).