What is it if it's just vomitting and diarrhea but no cold symptoms?

Stomach virus or food poisoning likely.

Well those are just two symptoms, so I would call it vomiting and diarrhea.

As for guesses what it might be, I agree with @ARE_you_kidding_me – probably having eaten bad food (or non-food), or maybe a stomach virus.

I think e-coli does tend to include fever symptoms.

In addition to what @ARE_you_kidding_me said, another possibility is noro-virus, which people will often call “stomach flu” even though it’s totally different from influenza.

E-coli is a bacterium though, not a virus.
http://www.webmd.com/a-to-z-guides/tc/e-coli-infection-topic-overview#1

Right, e. coli is a separate infection distinct from norovirus.

E-coli is good poisoning.

Those symptoms can be e-coli, campylobacter, salmonella, probably there are other bacterial that cause food poisoning I’m unaware of.

It also could be a stomach flu. When the diarrhea is severe I think it’s more likely food poisoning than stomach flu, but not necessarily.

^^food poisoning. LOL.

If you have an E.coli infection, you would be running a super high fever. E. coli goes systemic very quickly.

It could be a blockage, but it is probably a local gut virus. If it goes on for more than 24 hours, get thee to a clinic. In the meantime, hydrate, hydrate, hydrate. Water is good, but you should also drink nutritious liquids like chicken bouillon, consume and gatorade or something like gatorade to replace electrolytes. Try something solid when you feel up to it, but make sure it’s nutritious and not sugary junk food. Let your body expel whatever it is trying to get rid of, but if there is no improvement after 24 hours, it’s time to get checked out.

Or a mild case of food poisoning, but food poisoning comes with a fever. If you begin to feel like there is a porcupine in your stomach—severe stabbing pains all inside—it probably is food poisoning and you should call 911 or go to the ER stat. Stay away from dairy products no matter what the case.

Food poisoning does come with a fever although with all the puking and shitting you won’t even notice it at first. When your body is done evacuating most of the bad, then you’ll feel the fever, fatigue and sometimes chills, for 12 to 24 hours after or so. It may also include headaches and dizziness, when trying to do anything besides lying down.

Lol typo. I can barely see my screen.

It was funny, though. As opposed to bad poisoning.

I am thinking some allergies can cause such a type of mass evacuation. I could be mistaken.

Flu.
I don’t know why you would expect cold symptoms when it isn’t a cold.

Because flu is cold symptoms plus vomiting and green apple trots.
Since there are no cold symptoms, it probably isn’t the flu.

It could be e-coli, but it could be a toxin.
Lots of things can wrench your gut. Acid reflux can sometimes cause such unpleasant symptoms.

I’ve never experienced cold symptoms with the flu. To me a flu is just fever, vomiting and diarrhea, so sick and weak you can’t get out of bed. There is no sneezing or itching like with a cold. And I don’t end up bedridden with a cold.

But I understand that’s just me.

Sounds like food poisoning. Stay hydrated…