Brief Answer: You might have an Entrapment Neuropathy. Detailed Answer: Hi, thanks for writing to XXXXXXX Based on the presentation of your symptomatology, I suspect that you have some sort of Entrapment Neuropathy wherein the nerves supplying the hand (while passing down the limb from above downwards) will be compressed in the tight osteo-fascial tunnels/fascial bands through which they pass. And these tight bands or tunnels will become more tight during flexion movements (as in your case, with elbow bending) leading to numbness in the part supplied by that specific nerve and the compression will be released once you make the elbow straight leading to disappearence of numbness. So, these peripheral entrapment neuropathies may result due to compression of the nerves either in the axilla, the arm, elbow joint, forearm and the wrist. A Nerve conduction study of the affected limb is needed to know the exact site of compression of the nerve. I suggest you to consult a Neurophysician for a detailed evaluation and further management. Hope I have justified your query. Happy to help further Regards

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Brief Answer: A direct clinical examination is needed. Detailed Answer: Hi, Nice to hear from you. As already stated in my previous answer, the compression of the nerve might have been released due to the relaxation of the soft tissues (muscles, tendons and fascia which might be compressing the nerve) while straightening the arm. This transient numbness due to nerve compression is termed as Neuropraxia or Nerve concussion. To define the exact cause, a direct clinical examination is mandatory. Hope I have addressed your issue. Good day

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