My baby started arching her back when as soon as she turned 4 months old. She arches it right up and leans her head back so her weight is balancing on the crown of her head and bum. It hurts my neck looking at it
She used to only do it when she was tired or excited by something ie the mobile in the cot. Now she is doing it all day long and scooting upwards doing it. She doesn't seem upset when she does it.
I was just wondering if it was just exploring a new talent, or is it more sinister? I know back arching is sometimes indicative of brain damage in older people but idk about babies. CHN has never heard of babies doing this, oddly enough... she is a bit useless.