Dr. David A Johnson MD

Recommended Articles

• Tdap Vaccine for Whooping Cough

  The Tdap vaccine protects the body from three diseases: tetanus, diphtheria, and whooping cough....

• What Could an Itchy Vulva Mean?

  The vulva is the external part of the female genitalia, which includes the skin between the anus and the vagina, and the lips of the vagina. An itchy vulva is medically called pruritus vulvae. It is normal for women to experience a slight vulvar itch, but if you have an uncomfortable and persistent...

• Yawning Scientific Facts: Why Do We Yawn and Is It Contagious?

  What is yawning?Usually, yawning is associated with boredom, fatigue, and tiredness. Yawning is also very common in animals, such as dogs, monkeys, snakes, and carnivores. Yawning is also associated with numerous superstitious beliefs.In humans, yawning is considered as a purposeful non-verbal...

• Lactose Intolerance: Get the Facts

  Lactose intolerance is a digestive problem where the body cannot digest the lactose present in milk and dairy products. Lactose is naturally occurring sugar found in dairy products. It is the main carbohydrate found in all types of milk.In a very small number of cases the production of lactase may...

• The Main Causes of Lower Back Pain

  Brief AnatomyThe back is composed of layers of muscles that hold the spinal column in place. It is involved in moving, twisting, and bending, which is why the back is prone to muscle strain.The spinal column is made up of vertebrae that are divided into five regions. The spinal column provides...

• What are the Signs and Symptoms of an Ear Infection?

  Our ear consists of three parts: the outer ear, the middle ear, and the inner ear. Infections can occur in any part of the ear, but middle ear infections are the most common. The middle ear is the part of your ear located between your eardrums and inner ear. It is the air-filled space that contains...