In a nutshell, an allergy can be defined as an abnormal reaction from an individual’s immune system normally against a harmless substance. Individuals with no allergies would not have a reaction to these substances, or allergens, but the body’s of those who do release certain chemicals and it is these that cause the allergy symptoms.

An allergy can range from such things as itchy eyes to rashes to runny nose and is so widespread that they can affect 25% of the population at some stage of their lives. People have to be aware though, that these symptoms can be caused by factors other than an allergy as well, and could well be from a disease instead. More or less anything can be classed as an allergen for an individual but the most common come from pollen, dust mites, pets, insects, industrial chemicals, certain medicines and some foods like eggs and milk.

Common Allergic Reactions

The immune system of an allergic person reacts by producing special kinds of antibodies called IgE when it thinks it is being “damaged” by an allergen, and these antibodies attack the invader. This procedure then causes other blood cells to discharge other chemicals, which together with the antibodies cause the allergic reaction symptoms.

Food Allergies

Blood pressure is described as the pressure the force of blood applies to the artery walls as it flows through them. It is the pumping action of the heart that causes the blood to be under pressure. Normal blood pressure is an essential function in the workings of the body. Blood pressure is denoted by two numbers, 120/80 being an example (which happens to be considered an average blood pressure reading, by the way), with the first number being the systolic blood pressure, or the pressure when the heart is contracted while pumping the blood, and the second number is the diastolic blood pressure reading which is when the heart is at rest while filling with blood.

Naturally low pressure (usually thought of as lower than 90/60) doesn’t indicate any problems health wise. It could be normal for some people and indeed beneficial as it can lower incidences of stoke and coronary heart disease. It only becomes a problem if it is accompanied by symptoms such as fainting. This is normally caused by an underlying problem which would indicate that the blood pressure is not being regulated properly.

What to do in the case of Low Blood Pressure

If someone has constantly low blood pressure, then this could be classed as normal, however, if they have postural hypotension (blood pressure drops when standing up from a sitting position) or postprandial hypotension (blood pressure drops after eating), could mean there are underlying health problems. These could be taking drugs that are used to treat high blood pressure, illnesses that cause blood loss, diabetes, Addison’s disease (an adrenal gland disease), and early stages of pregnancy.

Treatment of low blood pressure normally depends on the underlying cause of the problem.

Swine flu is a disease that affects pigs and is a highly contagious type of respiratory disease caused by a version of the influenza A virus. Typically, swine flu is of the subtype designated as H1N1, and this is also the subtype that is currently affecting humans.

H1N1 Swine Flu Virus

Although swine flu normally affects pigs, it can sometimes jump to a different species, which is what has happened with humans. Symptoms of swine flu are, on the whole, very similar to normal seasonal influenza outbreaks in humans and can range between no symptoms at all or very mild symptoms, to severe and even fatal pneumonia. Because these symptoms are similar to the normal flu symptoms, swine flu is almost impossible to distinguish from normal flu, unless specifically looked for by a doctor.

Humans can catch swine flu either by contact with pigs that are infected, which is the most common way, and contact with humans that are infected, which is less common. For human to human infection to occur, very close contact needs to occur between the two parties.

Swine Flu Symptoms

The symptoms of swine flu in humans is very similar to normal influenza symptoms, as mentioned above, and these can be aches, chills, coughing, diarrhea, headache, sore throat, fever, fatigue and vomiting. Most previous cases of swine flu in humans has cleared up without any medical assistance, but there are a couple of drugs that are successful in treating the condition – adamantanes and inhibitors of influenza neuraminidase.