DS1 went through this phase as well and I was his chosen victim. I told him 'no, biting is not nice' in a firm voice and moved him away from me or put him down if I was holding him. He would cry and want to be cuddled. I would wait for about 10 seconds, then cuddle him and tell him again that he is not to bite. I would then tell him that I loved him.

It lasted about 3 weeks and he has never done it again. Now he is into pinching! He is a strong little monster too!