Why do I wake up sweating?

Perhaps it was a nightmare, I know sometimes I'll wake up sweating if I have had a particular terrifying dream. sometimes it could just be because you have been too warm under your covers and your body wakes you up to help regulate your body temperature.

i wake up sweating when i have a very bad dream or when I'm very very anxious and stressed out about stuff

Maybe you had a nightmare or something in that context. Or maybe you move quite a bit in your sleep.

could be anything. it could be night tremors/ nightmares/ anxiety or it could be the temperature of your room.

Your body is cleaning off the oils off you but the sweat usually sticks to you so the oil starts to have a smell

There are many reasons to wake up sweating. Most of the time it is related to anxiety. One possible reason is a bad dream or nightmare. Another reason that is unrelated to stress or anxiety is the room is too hot.

You may wake up sweating because a thought or dream you had previously had frightened you to where you wake up miserably and sweating hoping it doesn't happen to you when the new day starts.

There are many reasons that could cause that. i know from personal experience that some people just sweat in their sleep and some don't.... it could simply be the way that your body heals and repairs itself during sleep. If it is bothering you or interfering with your life i would consult a medical professional just to be safe and discuss what is best for you specifically. :)

Night sweats have several reasons, from night terrors (nightmares that you don't usually remember having when you wake up), a room that is too hot and humid, and some health conditions. Night terrors occur most commonly to people who have been going through a lot of stress, or who have a history of trauma or PTSD. If you are used to a cooler weather and are now living in a warmer and more humid place (like close to a body of water) and are used to having air conditioning but don't anymore, you may awake drenched in sweat. If you think that you may have a health concern, it is best to ask a doctor about it. If a physical cause isn't found, you may want to consult a sleep expert, a psychologist or a psychiatrist. Sleep is vital for your day to day functioning. Do your best.

Of course, i realize this can be a totally case-by-case thing and there may be factors unique to you that i am discounting, but the main thing I can think of is perhaps being stressed. Being overly anxious about the next day and can have negative physical impacts. When I wake up sweating, it is usually because I had a hard time falling asleep and just did not have a restful night. If this is the case for you, maybe try limiting screen time before bed and thinking of happy/calm thoughts as you fall asleep :) I find our 7 Cups guide regarding sleep quite helpful: https://www.7cups.com/sleeping-well/