Dr. Khaled R Girgis M.D., PH.D.

The term allergy refers to the exaggerated immune response to certain foreign substances that normally may be harmless. These substances, which trigger an allergic response, are called allergens. The allergens may not trigger a similar response in everybody, and may remain harmless for others. Some...

What Are Petechiae?Petechiae can be described as marks or blotches that normally appear on the skin and are tiny, round, and purplish or reddish in color. Petechiae are usually pinpoint-sized. Minor hemorrhage (bleeding that is localized below the skin) is the source of petechiae.Although they...

Sublingual immunotherapy, which is abbreviated as SLIT, is an alternative treatment method for allergies without the use of injections. SLIT involves the administration of allergens in small doses to patients to boost their tolerance to the chemicals, thereby reducing their symptoms. Allergic...

Pollen grains from flowers are the main cause for spring allergies. When pollen enters an individual's nasal cavities, particularly in those who are allergic to them, it stimulates the immune system to react in an allergic response. Antibodies produced by the immune system start attacking the...

The chance of getting infected by Lyme disease from a single bite depends on the type of the tick, how long it has been attached, and where it is acquired from. There are many types of ticks and not all of them can cause Lyme disease. The symptoms of Lyme disease are rash, fatigue, fever, facial...

What does the term “low immunity” mean?When you notice that your child catches a cold or the flu more often than other family members, or when it takes a long time for any wounds to heal, you begin to think that there is something wrong with your child's resistance.Low immunity is a term that...