Hives are a common allergic reaction that appears in the form of swollen, red bumps or patches on the skin. These usually appear suddenly and cause itchiness. In some cases, it may also sting or burn. Hives can affect any part of the body including the face, ears, tongue, lips and throat. Hives are usually small in size but may grow as large as the size of a dinner plate. In some cases, hives may also join together to form plaques.

Hives are caused as a result of the production of histamines in the body that make plasma leak out of blood vessels in the skin. These histamines are released as a result of an allergic reaction, exposure to chemicals, insect bites, sunlight or adverse reactions to certain medicines. There are four main types of hives:

Acute Urticaria: These hives usually last for less than 6 weeks. They are triggered by insect bites, allergic reactions to food, latex, medicines or by exposure to infections. The most common food items that trigger this type of hives are chocolates, nuts, fish, tomatoes, eggs, soy, wheat and milk. Aspirin and other medicines like ibuprofen, ACE inhibitors and codeine can also trigger these hives.

Chronic Urticaria: Hives that last for longer than 6 weeks fall into the category of chronic urticaria. IT is harder to find what triggers a case of chronic urticaria than it is for acute urticaria. Along with the triggers mentioned above, hormonal disorders, tumours, chronic infections and immune system disorders can also trigger these hives.

Physical Urticaria: Hives caused as a result of physically stimulating skin are called physical urticaria. This includes sudden exposure to heat or cold, sunlight, vibrations, pressure, exercise etc. These hives usually resolve themselves within an hour and only affect the part of the skin that has been stimulated.

Dermatographism: Hives caused by scratching or firmly stroking the skin fall under this fourth category.

Hives can also be genetic in nature. Some people suffer from hereditary angioedema which is a painful swelling under the skin.

Hives caused by an allergic reaction can recur and hence if you suffer from hives you should try and identify the allergen. This can be done by taking an allergen test in a hospital or by changing aspects of your diet and studying the results. Hives are usually treated with antihistamines but in some cases, steroids may also be needed. However, it is usually nothing to worry about.

What Are Hives? What Causes Hives?

Hives is a very common condition and about 20% of the world has got it at some point in their lives. There are many causes to it ranging from blood transfusions to certain allergic reactions to food. It starts off as an itchy patch of skin but slowly swells and turns into red welts. There are certain factors which makes the itching worse including stress, alcohol and scratching the area of skin which was itchy in the first place. 

Causes
Here are all the causes and symptoms of hives:
1. Food
Allergic reactions to foods such as nuts, eggs and shellfish are a common cause of hives.

2. Medications
Certain medications also have a side effect of causing hives. Penicillin and sulfa are two of the antibiotics, which can cause hives. Ibuprofen and Aspirin are also two other medications, which are commonly known to cause hives.

3. Infections
Both bacterial and viral infections can lead to hives. Strep throat, urinary tract infections, common cold and hepatitis are some of many bacterial and viral infections, which may cause hives.

4. Stimuli
Certain factors such as temperature, pressure, sun exposure and other physical stimuli may cause hives as well.

5. Plants and animals
Dander in animals are the flakes of skin in their fur. Moreover, coming into contact with certain poisonous plants may cause hives.

6. Insects
When insects sting or bite you, you may get hives.

7. Latex
Latex is a type of rubber used in many types of clothing. It has been said that wearing clothing made out of latex can cause hives.

8. Pollen
Pollen is a light powdery substance produced by plants such as oak trees. It travels through the air and may cause hives if it comes into contact with your skin.

Symptoms
1. Bumps
Itchy red bumps appear on the skin when you have hives. Sometimes, the bumps can be skin-colored as well.
2. Blanching
When the bumps turn white after you press them, it is known as blanching. Blanching is the only clear symptom of hives.

Hives: Causes and Symptoms

Hives, or  Urticaria  in medical parlance, is a skin condition characterized by the appearance of itchy swellings on the skin surface. Hives may break out on any part of your body and can be of different sizes. It is not a prolonged condition and generally lasts for a few hours. Urticaria or hives usually occur due to the secretion of certain chemical substances such as  histamine  from underneath the skin surface.

Some of the possible causes of hives are mentioned below:

Overexposure to sunlight
As a side effect of medicines such as aspirin, painkillers or antibiotics.
Insect bites
Any food related allergy may also trigger hives
People allergic to certain chemicals or latex can also develop hives
Sensitivity to temperature or water can cause hives
Infections such as Hepatitis or chronic diseases such as thyroid may result in the occurrence of hives.
Alcohol or caffeine intake can cause chronic urticaria
The most common symptoms of Hives include:

Skin becomes swollen
Frequent itching sensation
Skin inflammation is also common
You may feel a burning sensation
Within a short span of time, it may disappear and then again reappear on different parts of the body
Red and white patches appear all over the skin surface known as  wheals 
Hives generally go untreated as the condition subsides within a few hours. But sometimes, hives can be chronic or acute in nature. If so, it would require treatment as it can give rise to further complications. Some of the treatment methods are given below:

Corticosteroids may be prescribed by the doctor to control the formation of hives and give relief from inflammation.
Antihistamines (drugs which hinder the impacts of histamines; mainly used for curing allergies) are advised to patients with chronic urticaria. It controls the effects caused due to the discharge of histamines.
Knowing and avoiding the trigger conditions may prove to be helpful.
Applying menthol creams can give comfort due to its cooling properties.

Hives - Causes, Symptoms & Treatments

The last molar teeth in the mouth are called as wisdom teeth. While in some people they erupt completely into the mouth and function with no problem whatsoever, in others, they remain embedded in the bone, erupt incompletely, erupt at an angle, or are covered by bone or a flap of tissue. They are absent in many.
Of late, dentists recommend removal of wisdom teeth, more a preventative than remedial measure. Some of the reasons for wisdom tooth removal are listed below-
Impaction: Often, wisdom teeth do not have enough space to erupt in their normal position. This can only be evaluated properly on an x-ray. If the x-ray shows that the tooth is unlikely to erupt because of being blocked by a root or bone, this needs to be removed.
Pericoronitis: The tooth partially erupts into the mouth but is covered by a flap of gum. This attracts food and bacteria to accumulate, leading to decay and infection, a condition called as pericoronitis. Very common in the lower wisdom teeth, it leads to severe tooth pain, painful swallowing and swelling of the lymph nodes. This is the most common cause for wisdom teeth to be removed. An x-ray will reveal the tooth to be infected and sometimes periapical abscess may also be present.
Cysts: Impacted teeth can develop fluid-filled cysts which can cause severe and even permanent damage to the jaw bone, adjacent teeth and nerves. Dentigerous cysts are the most common type.
Alignment: Misaligned wisdom teeth exert a constant mild pressure on the adjacent teeth which can hamper the alignment and reverse the effects produced by braces. The bite may be altered also, thereby necessitating removal.
Adjacent Tooth Damage: If the malposed wisdom tooth is causing pocket formation or decay in the adjacent teeth, it is time to get them removed.
Recurrent Sinus Infections: With their proximity to sinuses, there could be constant pain and pressure and infection of the sinuses. This is another indication for their removal.
However, not all wisdom teeth need to be removed. If they have erupted fully, are healthy, produce a good bite, and can be cleaned easily, they do not require removal.
During the teenage years and through 20s, check with your dentist on the health of the wisdom teeth. X-rays can be taken to monitor them and for early identification of problems. If they need to be removed, it is easier to take them out when you're young. The bone surrounding the impacted tooth is less dense, and therefore easier. The ability of the body in general and the jaw bones in particular to heal is also better at a younger age. 


Wisdom Teeth - When To Get Them Removed

 Hives , also known as urticaria, is the outbreak of pale red, swollen bumps on the body. It can occur on any part of the body including the face, back, arms or legs. It is a type of hypersensitivity reaction in which the cause for the reaction is idiopathic (unknown). Also, it can come in various shapes and sizes. Hives can be associated with redness, itching, and a burning and stinging sensation. These can last for more than a minute or even more than that; up to days.

What causes hives?
Most of the times, hives are idiopathic, i.e. the reason that causes this type of hypersensitivity reaction is unknown. The bumps are caused by the action of histamine that makes the plasma in the blood leak out of the small blood vessels. Histamine is a substance that is released from a specialized cell and is what causes allergic responses in general. There are three types of hives- namely, acute, chronic urticaria and physical urticaria. Acute urticaria is when the hives last for less than six weeks. Chronic urticaria occurs when the hives last for more than six weeks. 

Physical urticaria refers to the condition when the hives are triggered due to causes such as heat, cold, sun exposure, sweating, pressure and exercise. Although, this condition is mainly idiopathic, there are common causes that may trigger this condition such as:

Foods such as nuts, fish, chocolates, milk and milk products
Environmental triggers such as pollen grains, dust etc
Medications such as ibuprofen or paracetamol
Insect bites
Latex
Blood transfusion
Bacterial infections including strep throat and urinary tract infection
Pet dander
Plants such as poison oak or poison ivy
What are the symptoms of urticaria?
Hives are usually self-diagnosable. The various symptoms of urticaria are:

Swollen red bumps known as weals
The red bumps can occur suddenly and subside all of a sudden as well
 Blanching which is characterized by the whitening of the swollen red part.
They occur on any part of the body and can change shapes, and sizes. It can become larger or it can reduce in size; it can also move around in the body.

Hives - Most Common 9 Reasons Behind It!

Hives, also called urticaria are swollen welts or bumps that appear on your skin suddenly.

They itch, burn and sting and can happen anywhere on your body. You can get them on your face, lips, tongue, ears or chest. And in size, they can be as small as an eraser to as large as a plate. They also form plaques and can last for hours or up to several days.

Types

Acute urticaria - These type of hives last less than six weeks. The most common causes are allergies due to certain foods and medications, or infections. These hives can also happen due to diseases or insect bites.
Chronic urticaria - Hives lasting more than six weeks come under this category. What causes them is usually more difficult to identify than what causes acute urticaria. In some cases, chronic hives are caused due to thyroid disease, hepatitis or even cancer. This type can affect your internal organs like lungs, muscles, and the gut. Thus, symptoms include muscle soreness, shortness of breath, vomiting, and diarrhoea.
Physical urticaria - These types are caused due to direct physical stimulation of the skin due to cold, heat, sun exposure, vibration, pressure, sweating, and exercise.
What causes hives?

Hives happen mostly due to allergies. Some of the common hive triggers are-

Certain foods, especially peanuts, eggs, nuts and shellfish- Fresh foods are more likely to cause hives as compared to cooked foods. Certain food additives and preservatives can also play culprits. Medicines like penicillin and sulfa- based antibiotics, aspirin and ibuprofen which are non-steroidal anti-inflammatory medications, high blood pressure drugs like ACE inhibitors, and painkillers such as codeine can also trigger hives. Other things that may cause it are:

Insect bites
Latex
Transfusion of blood
Bacterial infections, including urinary tract infections and infected throat
Viral infections- common cold and hepatitis
Pollen grains
Plants like poison oak and poison ivy
Sunlight
Cold weather
Pet dander 
If you wish to discuss about any specific problem, you can consult a dermatologist.

What Are Hives? What Causes Them?

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