Air carrier Flight Attendant reported a persistent dirty socks odor in the passenger cabin during cruise which was reported to the Captain. After troubleshooting the flight diverted to a suitable airport where airport personnel met and provided medical support.

Narrative

Before take off FA#2 called me about a odor in the back cabin and galley; so I went back to confirm what he smelled and I smelled the odor too as I approached row 21 and FA#4 did as well. After take off FA#2 told me that the odor was still there so I went back there again to confirm what they could smell. I told him to go ahead and call the captain and let him know. I went back up to the front galley. FA#2 came to front galley and told me that he let the captain know and that he was feeling light headed and a little dizzy so I told him he may need to go on oxygen and call the captain back and let him know what he was experiencing. The captain then asked if he needed to call the POC (Physician on Call). The POC was contacted and he was told to get on oxygen.Captain called and asked about smell; so I did a cabin check and called him back and let him know the sweet odor was still present. Captain told me that he was going to try to flush the cabin air and see if that helps. Afterwards he called and I did a cabin check and sweet odor was still back there. After the cabin service that FA#4 and I did her symptoms heightened and she went on oxygen as well. I updated the captain on the odor and both fa's and told him passengers were asking concerning questions. He let us know that we would be diverting and that the oxygen mask would be deployed at 14;000 ft when we started descending and he made a PA to the passengers. FA# 2 and FA #4 said they had a combination of symptoms of feeling foggy; lightheaded; dizzy; sick to stomach; eyes burning; metallic taste; dry mouth; and a little slow articulating. Captain made an announcement that oxygen mask were being deployed when we reached 14;000 ft and FA# 2 made an announcement instructing on how to use them and I went through the cabin to check on the passengers and to make sure they were ok and knew how to properly use them if they needed oxygen. After landing we were met by two managers and the police; emt; fire dept. A announcement was made to the passengers that if they needed any medical attention and want to be checked out it was available for them. The emt's checked our vitals. I was told mine checked out fine. I only had a metallic taste in my mouth which I have had [previously]. We were then bused to terminal. Once we deplaned 2 supervisors met the flight and was given an brochure and a letter to attend a mandatory meeting tomorrow that I have been withheld from service for a investigation into a potential performance matter.This event was handled really well by the crew. We all communicated well and worked as a team. We all took care of each other and our passengers. We all put safety first. I was also contacted by several inflight managers to see how we were doing and received instruction and support about what we needed to do.