I’m 49. At 44, one glass of wine flared my rosacea. Seafood broke me out in welts. Leftovers covered me in hives. Today, none of it happens. And the reason isn’t an antihistamine. After 20+ years in women’s health & hormones, here’s the loop nobody is connecting. Your skin flushes. You’re bloated. You’re itchy. You’re anxious for no reason. Your doctor calls it anxiety or hands you an antihistamine. Estrogen tells your immune cells to release histamine. Progesterone tells them to calm down. In perimenopause, progesterone drops first, often years before your period gets irregular. Estrogen swings wildly. The brakes are gone. Histamine builds up. But hormones aren’t the whole story. When immune cells release histamine, they also release inflammation the same cytokines that drive insulin resistance. That inflammation blocks insulin. High insulin then triggers more histamine. The loop feeds itself. This is why women with sudden histamine symptoms can’t lose weight. And why women who c...