@DannyWith2Shoes,
Do you do a lot of cardiovascular exercise? It may just be that you have a strong heart beat. When I used to cycle regularly, I could see various veins pulsing in my body, like at my wrists, the inside bends of my arms, my neck, etc. When I'd lie in bed, the pulsing of my heart would cause the bed to creak in rythm.
But if it's a concern, you should see a doctor about it.