When insulin isn't working effectively, the body struggles to use glucose for energy and instead begins breaking down fat and muscle for fuel, leading to unexpected weight loss.
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4. Slow-Healing Cuts and Wounds
High blood sugar can damage blood vessels and reduce circulation, making it harder for oxygen and nutrients to reach injured tissues.
As a result, cuts, scrapes, and bruises may take much longer to heal than usual. Slow wound healing also increases the risk of infections.
5. Dark Patches of Skin
Dark, velvety areas of skin—especially around the neck, armpits, or groin—may be a sign of insulin resistance.