Feng Long is a great point for draining phlegm. Use it when you have a head cold, wet cough, or allergies . Find ST-40 halfway between the knee and the ankle, on the outside of the lower leg. Feel around for a sore spot: You’ll know when you hit it. Press firmly for 10-15 seconds. It’s great for “visible” phlegm, the obvious mucus stopping up your nose and lungs. It’s also useful for “invisible” phlegm, the kind that clogs up your brain and leads to dizziness, vertigo, “foggy headedness” (fuzzy thinking), or mental illness.