My wife is very hot tempered and she like to hit me when she lose her temper. She will dig her fingernail into my skin and sometimes she will slam my head against the wall. I don't want to hit her back. I love her. I believe she loves me too. How can I calm her down. And stop her from abusing me like this.

She's lucky to have you, my spouse is opposite, hes high tempered and belittled my feelings. Yes he never abusive me physically but he does all the time abusive me mentally and emotionally I think you both need to have sit and talk when she's in calm mood and bring bit humour to relaxing the situation if first try not succeed, going to marriage counsellors might helps her to see and she can listen input from third party. I wish you all the best.