Final answer:
There is no specific contra-indication for OMD treatment, but individual cases should be assessed by a healthcare professional.
Step-by-step explanation:
A contra-indication for OMD treatment refers to a condition or factor that makes it inappropriate or potentially harmful to administer this treatment. One example of a contra-indication might be an allergic reaction to a medication used in OMD treatment. Another example could be a patient with a pre-existing medical condition that could be aggravated by the treatment.
Therefore, the correct answer to the question is that there is no specific contra-indication for OMD treatment. This means that no conditions or factors have been identified that categorically rule out the use of OMD treatment. However, it is important to note that individual cases may vary, and a healthcare professional should always assess the patient's specific situation to determine the suitability of OMD treatment.