Hi, I'm Doing This For My Brother In Law, Who

hi, I'm doing this for my brother in law, who is 45 ish, white male, self employed construction worker. ( doing house jobs near Hartford, ct. He loves the outdoors, mainly hunting. He has been so extremely tired that it is hard for him to work, be continues. at times has a fever. On the way home from work he had to stop at his sisters cause he was afraid that he was going to pass out. His sister said that looking at him, it looked
like he wasn't there. Sent him to the hospital and had a 2 night stay. They couldn't find anything. My sister in law said that they are going to a specialist for lymes dis. His heart is irregular but not anything that needs attention, from what my sister in law says. Any ideas? so that this once so active man can get back to his life. He is / was a smoker. weight maybe 175