B737-800
Physiological - Other; Situational Awareness
Flight Deck / Cabin / Aircraft Event Illness / Injury; Flight Deck / Cabin / Aircraft Event Smoke / Fire / Fumes / Odor
Air Traffic Control Provided Assistance; Flight Crew Diverted; Flight Crew Landed As Precaution; Flight Crew Returned To Departure Airport; General Maintenance Action
Environment - Non Weather Related; Aircraft; Human Factors
Everything was fine until we took off and the entire plane started to smell like something was burning. The smell was extremely strong. I checked the lavatories and checked my surrounding areas; but there was no smoke or indications that something was on fire. The smell was a burning smell; ironically mixed with a scent of wet dog or pee. Flight Attendant #2 called Flight Attendant #1 to ask if she could come back to see if she smelt it but she confirmed it was smelling like that throughout the cabin.  I wasn't on the phone; but to my knowledge; the Captain over heard the conversation and said he was smelling the same. He originally said we were going to continue on our way to ZZZ1 but the smell never subsided. Not much longer; the Captain called and said we will be diverting back to ZZZ. I felt extremely nauseous when he prepared us for landing; but I didn't think much of it until I found myself sick in the restroom after we landed. I also felt very dizzy and my skin feels like it's on fire. Others on my crew felt symptoms as well.
After take-off; [Flight Attendant] #1 and I started smelling something foul. [Flight Attendant] #2 called the [Flight Attendant] #1 to see if all crew was smelling the same thing and the cockpit pitched in saying they were smelling something pungent as well. At first; the pilots wanted to continue on; but when the smell kept coming back; they decided to head back to ZZZ. [Flight Attendant]  #4 felt nauseous and threw up; [Flight Attendant] #1 had a headache; and the cockpit had a headache along with itchy and dry eyes. I felt nauseous and had a severe headache with heat flashes. As a team; we have decided to go to the ER to check ourselves out.
B737-800 flight attendants reported strong burning odor in passenger cabin resulting in health issues. Odor was reported to Captain who confirmed the odor and stated they were returning to departure airport.