Nearly everyone has had a stomach ache that vanished by morning. That’s exactly why it’s so easy to brush off one that feels a bit different. Is it gas? Something you ate? Or something that shouldn’t wait?

I’m not a doctor, and no article can tell you what’s happening inside your body. But I can help you think about how seriously to take what you’re feeling.

One pattern worth knowing: with an inflamed appendix, people often describe a dull ache near the belly button that slowly travels to the lower right and turns sharper. Not everyone gets it this way, but it’s useful to have in the back of your mind.

Pay attention to how the pain behaves. If it keeps getting worse over a few hours instead of coming and going, take it seriously. The same goes for pain that spikes when you cough, walk or press on the spot.

Look at what else is happening. Loss of appetite, nausea, vomiting, a mild fever, or just feeling properly unwell can come along with it. Any of those next to belly pain is a good reason to call someone.

It’s tempting to take a painkiller and see if it settles. The trouble is that medication can mask what’s going on and make it harder for a doctor to figure it out. If you’re worried, speak to a professional before you start covering it up. And ask before reaching for a heat pad, too.

Some signs mean you shouldn’t wait at all: sudden, severe pain, a hard or rigid belly, high fever, repeated vomiting, or pain that spreads across your whole abdomen. Go to emergency.

Remember that young children and older adults can look different. A small child may not be able to explain where it hurts, and an older person might have milder symptoms than you’d expect. If someone just seems very unwell, trust that feeling.

When you do see a doctor, tell them when it started, where it began, where it is now, and anything else you’ve noticed. Mention previous belly problems or surgeries. Expect them to press on your abdomen and maybe suggest blood tests or imaging. That’s normal.

If the appendix does turn out to be the culprit, it can help to read about what the surgery actually involves before you’re lying in a hospital bed trying to take it all in. Knowing the basics makes it easier to ask good questions.

Going in and being told it’s nothing serious is always better than sitting at home hoping.