The definition of a syndrome is; a group of symptoms that together are characteristic of a specific disorder, disease, or the like. The symptoms generally form patterns which can be identified and help determine if an individual's ailments are being caused by SBS.

A building considered 'sick' when 20 percent or more of the occupants have the same symptoms for two weeks or more, and affected individuals experience quick relief away from the 'sick' building. The 20 percent is a general guideline. Consider a company of 2000 employees - if 10 percent are complaining of illness, that's 200 people whose suffering could be relieved.

BRI (Building Related Illness) is closely related to SBS. Specific health effects that result in known illnesses, such as Legionnaire's disease can be the direct result of building conditions. Once identified, a BRI can help determine the source contaminants and ways to resolve the situation. Most BRI facilities have passed through the SBS stage and still have other contamination issues.

SBS SYMPTOMS

There are five main SBS symptoms. They can occur singly or in combination and may occur in random episodes or in cycles. These symptoms frequently resemble the common cold or other respitory problems. The affected occupants tend to get worse through the day and sometimes throughout the work week. Their symptoms lessen or vanish completely when away from the building for a period of time.

1. Eye Irritation
   Eyes are dry, burning, gritty feeling but with no signs of inflammation. The level of sensitivity may vary from day to day. People who wear contact lenses are apt to be more severely affected.
    
2. Nasal Problems
   Congestion or 'stuffiness' is the most commont complaint and usually develops quickly when the occupant enters the building and continues until he or she leaves the building. Relief generally follows quickly upon departure.
    
3. Throat & Lower Respiratory Tract Issues
   Continual dryness in the throat without inflammation is a standard symptom. Drinking large amounts of water may help. Shortness of breath that is unrelated to asthma or any lung infection may indicate a problem with the lower respiratory track. Walking outside and taking several deep breaths of fresh air generally brings relief.
    
4. Headaches, Fatigue & General Malaise
   Headaches, headache related fatigue, dizziness,trouble concentrating and general malaise are the most common symptoms of SBS. The headaches can vary from moderate to severe migraines.
    
5. Skin Problems
   Dry skin may be caused by SBS due to an excess of air movement or very warm, dry air. Some occupants may develop skin irritation or rashes due to airborn contaminants. SBS can also exacerbate pre-exisiting conditions like eczema and sinusitis.