Noticed bite marks on my leg - cockroach bite or bed bug? Need help!

Hello there, I thought I'd mention my situation with what I believe to be a roach bite - I discovered these weird swollen spots on my arm and wasn't sure if it was a cockroach bite vs bed bug since the symptoms were pretty confusing. What are the signs because I'm seeing some redness and swelling and discomfort - can cockroaches bite humans or am I dealing with a different pest? I've been researching how to treat a cockroach bite and tried some cockroach bite home remedy options like basic first aid but how to prevent cockroach bites long until it goes away and should I be watching for cockroach bite infection? Any advice on dealing with bites would be great!