<s>[INST] Hi, When i raise my arms above my head, and the blood flow is lessened, It takes my right arm ages to recover, i.e, It feels like blood is flowing in less efficiently compaired to the left arm. and it feels warm like the other arm feels when the blood flow is resored to norman (by putting my arms back down) for ages? does this make sense>? [/INST] Hello and welcome to Chat Doctor, Numbness and cold sensation while holding the arm upwards suggests that there is some kind of obstruction to the blood supply to the upper limbs. A MRI of the upper limb and the shoulder girdles is required to look for any abnormality in the shoulder region. Numbness can be due to compression of the nerve trunks in the armpit region. Thus, clinical assessment, relevant investigations should be done to plan further management. Consult an orthopedic for further work up. Thanks and take care Chat Doctor.  </s>