Dr. Yannis Sergio Guerra M.D.

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• How Can I Prevent Cold Sores?

  Cold sores are groups of small fluid-filled blisters that form on and around the lips. These blisters, also known as fever blisters, are sore and reddish in color. As the blister breaks open, the fluid oozes out and forms a crust. In most cases, cold sores resolve within few weeks.Fever blisters are...

• Is Syphilis an STD?

  What is an STD?Sexually transmitted disease, or commonly known as STD, is a type of disease that gets transmitted through sexual contact. AIDS caused by the HIV virus is a primary example of a sexually transmitted disease. Most STDs do not have any obvious symptoms at the beginning, aside from the...

• Is Your Poop Healthy?

  Have you ever given a glance at your poop before flushing it? Probably, not! We mostly do it every day, but never realize that the look and color of our poop can indicate a lot of things about our health. Yes! Our pooping habits can tell a lot about whether we are leading a healthy lifestyle or not....

• Sperm Cells Mimic Embryonic Stem Cells

  Sperm cells in the testicles are able to mimic the embryonic stem cells and can develop into any of the adult cells in the body. These germ cells, also called spermatogonial cells, belong to the adult stem cells and are the precursor of sperm cells.Based on a new study published in the online...

• What Is Acid Reflux: Causes, Treatment, and Prevention

  Acid reflux is a common condition wherein a person feels an internal burning pain in the lower chest area due to the stomach acid backflow into the esophagus (food pipe). Once in a while, acid reflux may be experienced. It is a common condition, which you should not worry about. However, if you...

• Is Hair Dye Safe?

  Dying one's hair is a common routine for men and women who experience changes in the color of their hair as they age. Although long-term safety of these products are not clear, there are some precautionary measures to be followed while using a dye.One should consider the following before dying his...