One often overlooked symptom I think we should pay more attention to is fatigue that lasts for weeks without rest or lifestyle changes. Many people write it off as stress, burnout or aging but in several cases I've seen it was an early sign of underlying cancers like leukemia, colon or pancreatic. The reason this is so important is that it appears long before other symptoms like pain or lumps. The body is basically saying something deeper is draining its resources and ignoring it delays early detection — which is key to successful treatment outcomes. In my experience it's not about scaring people but raising awareness of subtle persistent changes. If someone's fatigue is out of proportion to their lifestyle or lasts longer than expected that's a sign worth checking with a doctor. Early curiosity saves lives more than late concern.
I'm not a medical professional, so I can't speak like a clinician or claim medical experience diagnosing patients, but I can speak from the angle of running SourcingXpro and being around founders who push too hard and ignore their body until it's too late. The one overlooked sign I notice a lot of people wave off is unusual fatigue that feels different from normal stress or overwork. I had a supplier in Shenzhen who brushed it off for months because he assumed it was just peak season pressure. Later he learned it was cancer. That stuck with me so much because everyone in ecommerce accepts burnout as normal. The danger is when it stops feeling like tired and starts feeling unfamiliar. That is the point where people need to get checked and not just grind harder.