The numbness of the little finger in the right hand is most likely caused by cervical spondylosis, because cervical spondylosis of the nerve root type can cause numbness of the little finger due to the stimulation and compression of the adjacent nerve roots. Of course, we should also pay attention to numbness caused by cold stimulation and numbness caused by excessive fatigue, and if the pinky is red and swollen, we should also pay attention to the presence of rheumatism and bone and joint diseases that cause numbness in the fingers. For patients with numbness in the fingers should be examined to determine the cause, especially cervical spine examination and neurological examination, such as cervical spine area light film examination and brain imaging, such as MRI, CT, etc., to determine the specific cause of numbness in the little finger before considering targeted treatment.