Gut-Immune Link Might Explain Why You Feel 'Always Sick'

An immunologist says feeling like you’re “always sick” is deeply personal and may reflect an immune system that’s constantly challenged. He emphasizes starting with gut health, noting that the gut microbiome trains the immune system and that shifts in gut bacteria can influence how the body responds to infections. Improving gut health—through quality sleep, plenty of dietary fiber, probiotics, and mindful antibiotic use—may help reduce sickness frequency, though stress, diet, and rare hereditary factors can also play a role. Always discuss persistent illness with your healthcare provider.