Thyroid function tests is a collective term for blood tests used to check the function of the thyroid. TFTs may be requested if a patient is thought to suffer from hyperthyroidism or hypothyroidism, or to monitor the effectiveness of either thyroid-suppression or hormone replacement therapy
The T3 test checks for levels of the hormone triiodothyronine. It’s usually ordered if T4 tests and TSH tests suggest hyperthyroidism. The T3 test may also be ordered if you’re showing signs of an overactive thyroid gland and your T4 and TSH
To diagnose a food allergy for certain, an allergist might do a blood test in addition to skin testing. ... The lab checks the blood for IgE antibodies to specific foods. If enough IgE antibodies to a particular food are in the blood, it's very likely that the person is allergic to it.
Allergic contact dermatitis occurs when the skin comes into direct contact with an allergen. The result of the skin allergy is a red, itchy rash that can include small blisters or bumps. The rash arises whenever the skin comes into contact with the allergen, a substance that the immune system attacks.
Dust mite allergy is an allergic reaction to tiny bugs that commonly live in house dust. Signs of dust mite allergy include those common to hay fever, such as sneezing and runny nose. Many people with dust mite allergy also experience signs of asthma, such as wheezing and difficulty breathing.
Allergic eczema is a form of eczema that occurs in response to contact with an allergen. ... It is commonly called contact dermatitis. The primary symptom of allergic eczema and other eczema types is a dry, itchy rash. Some types of eczema may be painful or cause blisters to form.
A drug allergy is the abnormal reaction of your immune system to a medication. Any medication — over-the-counter, prescription or herbal — is capable of inducing a drug allergy. However, a drug allergy is more likely with certain medications. The most common signs and symptoms of drug allergy are hives, rash or fever.
Eye allergies — red, itchy, watery eyes that are bothered by the same irritants (allergens) that cause sneezing and a runny nose among seasonal allergy sufferers — are very common. ... In some cases, eye allergies can play a role in conjunctivitis (pink eye) and other eye infections.
Insect Sting Allergy
Symptoms of a non-allergic insect sting include redness, swelling and/or itching at the site of the sting. Symptoms of an allergic reaction may include itching and hives, swelling in the throat or tongue, difficulty breathing, dizziness, stomach cramps, nausea or diarrhea.