Should we go to the hospital. my brother has extremely headache and chest pain and his arm is numb arm and short nest of breadth?

Seek urgent eval: Yes. We cannot otherwise evaluate online. He should be evaluated and assessed in person urgently.

Call 911!: There are two very dangerous conditions, that your brother could be having. Time is of essence. Call 911 for immediate evaluation now.

Yes, immediately: These symptoms can be a sign of stroke or Heart Attack and your brother needs to be seen ASAP. Don't wait to/ the ER immediately. Good Luck.