I had a dcg , it started around the same age , who would slam her head/face when upset . I tried countless times talking with the parents and although they would admit it was getting to be a problem ( uh ya !) had very little interest in dealing with it . I documented , and kept a close eye in her but one day after another child and her grabbed the same toy and she didn't get it , she walked away , as I was congratulating her on sharing ect she was looking straight at me , walked over to the little tyke slide and smashed her face into it until I ran to stop her . Her mom was so confused why I called her for immediate pick up !!!
I termed eventually because of no support from parents . Although they told me to spank her ! Goodness !!!
I explained why I would never be doing that here , and I think they felt like I wasn't willing to "help" with the issue !!!!
I saw this child not a couple of weeks ago , they didn't see me . I watched her and thought maybe I was wrong not to work through with her but then the mom told her they had to go and she went into a fit ! But now she's 3 and not do little !
I think if you put your little guy into a playpen he might be able to still hurt himself . I would to be safe nap him on a mat but then I realize nap might be a gong show .
They used to sell crib pads for over top of the bars , that might work !!