A burning sensation in one spot on your scalp is often caused by nerve irritation, skin inflammation, or a localized infection. Unlike generalized scalp pain, a single painful point usually points to a specific trigger rather than a widespread condition. The most common root causes include occipital neuralgia (a pinched nerve in the upper spine), … Read more
Think of your immune system as having different types of soldiers, each with a specific job. The Ly6C marker is a protein on the surface of certain immune cells, mostly a type called monocytes. It acts like a nametag that tells researchers what kind of monocyte it is and what it is likely to do … Read more
Yes, you should floss first and then brush. That order is better supported by evidence for removing plaque and keeping fluoride on your teeth longer. Flossing loosens food and plaque from between teeth. Brushing afterward washes that debris away and delivers fluoride to areas floss just cleaned. Does the order of flossing and brushing really … Read more
Hemoglobin is the protein in your red blood cells that carries oxygen from your lungs to every part of your body. It also picks up carbon dioxide and brings it back to your lungs so you can breathe it out. Without enough healthy hemoglobin, your tissues cannot get the oxygen they need to function. What … Read more
The average adult human body holds about 10.5 pints of blood. That is the number for a person weighing roughly 160 pounds. Your own number depends mostly on your body size. A smaller person has less blood. A larger person has more. This is not a guess. It is a well-established physiological range. How Much … Read more
Brown rice does not spike blood sugar as sharply as white rice, but it can still raise glucose levels significantly, especially for people with diabetes or insulin resistance. The difference comes down to how fast your body breaks down the carbohydrates. Brown rice has more fiber and nutrients intact, which slows digestion. But it is … Read more
Earwax is normal and healthy. Most people never need to clean it out. Your ears are self-cleaning. If you have symptoms like muffled hearing or fullness, the safest approach is to soften the wax at home with a few drops of mineral oil or over-the-counter ear drops, then let gravity and jaw movement do the … Read more
You do not need a microscope to see many human cells. The largest human cell is the egg cell, or ovum, which is about 0.1 millimeters wide — roughly the size of a period at the end of a sentence. You can also see some skin cells, cheek cells, and nerve cells with nothing more … Read more
Measuring a spline shaft with calipers or pins comes down to knowing two things: the pitch diameter and the tooth thickness. You can get a usable measurement by placing pins of known diameter between the spline teeth, measuring over those pins with calipers, and then using a standard formula to find the pitch diameter. For … Read more
A TENS unit can help with trapezius muscle pain by sending mild electrical pulses through the skin to reduce pain signals. To use one for trapezius pain, place two electrodes on the upper traps near the base of the skull and two on the mid-traps between the shoulder blade and spine. Set the unit to … Read more