Dr. Nicholas Kahlert Johnson M.D.

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• Is Lower Back Pain a Sign of Testicular Cancer?

  Testicular cancer affects the male sex organs called the testes, two oval shaped gonads located just beneath the penis, which are primarily responsible for producing male sex cells called sperm, as well as the male sex hormone called testosterone. Cancer mainly affects the germ cells, which in...

• Saw Palmetto Health Benefits: Uses, Dosage, and Side Effects

  What is saw palmetto?Saw palmetto is a type of palm tree mostly found in Florida and other Southeastern states. Florida's Seminole tribe used to eat the saw palmetto fruit as part of their diet and treated various medical conditions including reproductive and urinary problems, which are associated...

• Kidney Stones: What is Urinary Retention Medication?

  Kidney stones come about from an infection that leads to formation of stone-like structures in the kidney. Kidney stones are made up of different materials, mostly being acidic salts and minerals filtered from the blood by the kidney. These minerals, once filtered from the blood, fail to dissolve...

• Chlamydia in Men

  What is chlamydia?Chlamydia is one of the most widespread sexually transmitted diseases (STDs) in the United States. It is caused by the bacteria Chlamydia trachomatis. Chlamydia infection is more or less like gonorrhea in terms of its symptoms and format of spreading from one person to the other....

• Leukocytes in Urine: What Does Leukocyte Esterase in Urine Mean?

  What are leukocytes?White blood cells (WBCs) are also called as leukocytes. They protect the body from infections by fighting foreign invaders such as viruses, bacteria, fungi, or parasites. Phagocytes and lymphocytes are forms of white blood cells (WBCs).Phagocytes engulf foreign particles like...

• How Long Can Sperm Live?

  Introduction An average man ejaculates 1/2 teaspoon to 1 teaspoon of semen. This small amount of semen contains millions of sperm cells. It only takes one sperm to fertilize an egg, but each sperm has a limited life span, which begins once it leaves a man's body.For a couple trying to have a baby,...