Your b-complex is not very high dose. But it does have a good amount of thiamine in it, and that helps with alcohol metabolism.

The B12 is not very high, though. If your goal is to raise B12 blood levels, taking that separately as methylcobalamin would be the way to go. There is a B12 link in our stickies at the top of the forum page with lots of information on B12.

You may have some compression issue, due to arthritis in the neck or elbow, or beginning TOS. I'd not do the push ups for a while and see if you get a bit better with resting from that activity etc.

As we age our tendons become less elastic and easier to damage. Silica is one nutrient the tendons are composed of, and certain foods are high in it.
http://www.buzzle.com/articles/silic...e-in-food.html

The family of antibiotics called fluoroquinolones (Cipro, Levaquin and Avelox) are known causers of tendon ruptures.
How they do this is not understood yet, but can happen up a year after using any of these antibiotics. If you have had any of these antibiotics I would be cautious and not strain any tendon for a while.

Also there is a condition called "trigger finger", which comes with age, and also is more common in diabetics. This is when the tendon shealth gets "stuck" in the contracted mode in the hand. It is more common in one finger, but could happen in all of them. Here is a diagram:
http://www.davidlnelson.md/Trigger_Finger.htm
There is a little knob develops on the bottom of each finger tendon and if the hand contracts too far, the tendon slips over it and cannot release properly. Only a good hand doctor can deal with this, and it may require surgical release.

If relaxing with magnesium does not help, you will have to seek out a doctor for more details.