Ouch! How mean! He sounds like a total twat to be honest.
If he is worried about your weight and health, there are kinder ways to state it. NOT by randomly insulting bits of your body.
You don't sound obese or anything though. Only you know yourself whether you need to take better care of your health, but this is basically verbal abuse from a nasty man who clearly has zero concern for your feelings!!
I am fit, healthy, aged 48, am 5 7", weigh under 70 kg and have not needed to lose any weight since I was maybe in my twenties. Didn't stop my abusive ex from picking on parts of my relatively perfect body though, JUST like you. Believe me, you could have the bod of a lingerie model and these types would STILL look for something to criticise because they WANT to hurt you and make you feel like shit.
When called out on it, my ex would do one or a combination of various things: Deny, rationalise, say it was a joke, tell me he was trying to help me. But he contradicted himself. One day my arse was too fat, one day too small and I needed plastic surgery. My arms too saggy, too many blackheads on my nose, too many grey hairs, legs too muscular, too many obvious veins, hair too flat, wrinkly neck... you get the picture. These insults were delivered in various ways, and not all at once. Very nasty, clever man whom I gave too many years of my life to. He also told me I couldn't cook or clean as well as he did.
I dumped him eventually for good and he freaked out and told me I am an old bag and no man will ever want me.
Well that's not true - can you see the tactic? Can you see what is being done to you? Eventually your self-esteem will be so low, like mine, that who knows what will happen..... I arrived at a very dark place at one point because of the abuse. Out of it now. but he had a toxic hold on me for a very long time.
There is usually no hope for these people. As you have a home and a child together, it makes things more complicated, but I would still advise you look at how you could get away from him. What he is doing is beyond unacceptable and I am sure there are new laws in place about this kind of domestic abuse.
And the frozen thing - yep - I had that. He would flip back into Mr Nice Guy and I would start blaming myself and my body and started hating my poor body and looking at having plastic surgery and this, that and the other. Poor me, what he did to me as he smiled a few minutes later and asked me what I would like for dinner my love....
You don't want to believe the man you made a life with is actually a bastard. But the sooner you realise that, the quicker you will take back your power.