Could it be leap 5 (22 weeks)? Same with my daughter and she turns 5 months on Monday.
Teething and maybe he is bored or sleepy.. can be overstimulated too. Try to do for a long walk fresh air helps when they fussy and a nice bath too
Same here, my son will be 5 months on Tuesday and he is extra fussy and stops crying only when he is held 🙄 I suppose he’s teething 🥲
Mine turned 5 months earlier this month and he’s the saaaame exact way but he’s also teething.
I also have a 5 month old and he’s acting the same way! Teething, I believe. I remember our 3 year old being the same way at this age, then boom teeth!
Maybe his teeth are coming?