Acne occurs when the pores on your skin become blocked with oil, dead skin, or bacteria. Each pore on your skin is the opening to a follicle. The follicle is made up of a hair and a sebaceous (oil) gland. The oil gland releases sebum (oil), which travels up the hair, out of the pore, and onto your skin. The sebum keeps your skin lubricated and soft. Acne can be caused by one or more problems in this lubrication process.
In between exposures, a person's IgE level may drop. Sometimes an individual has a condition that affects the immune system and will not produce normal amounts of immunoglobulins. In this case, a person could have an allergy that is not reflected by the total IgE test result.
Creatinine in the blood increases with muscle mass, so men often have higher creatinine levels than women, the Mayo Clinic explains. A high serum creatinine level means your kidneys arenât working well. So if your number is high, your doctor will order a GFR to see how much kidney function you have left. GFR may also be estimated from your blood level of creatinine. If your GFR falls below 30 you will need to see a kidney disease specialist (a nephrologist).