sensation thickness in foot

When I wake up in the morning, the soles of my feet feel as though they are extra thick: almost as if I am wearing socks.  Note:  sensation is only on soles of feet.  It does not affect my ability to walk and sensation has usually disappeared within 30 minutes after getting up.  If I scratch soles of feet I get a normal feeling of scratlching.  No pain.  Age 77, still jogging, no medical problems.  My doctor is puzzled and has just taken blood sample for B12 deficiency (the only thing he says he can think it might be).  

[painkiller99]

Do you have other symptoms as well? Any history of diabetes? If not, it is possible that the condition may be just due to prolonged immobilization of both your feet, especially since you said they only occur when you wake up in the morning and disappear around 30 minutes later.  Observe your symptoms for the time being and see if any progression or new symptom occurs.