1 It's the law! 2  All drugs have to be tested on animals before they can be tested on humans. 3  To make sure human patients are given a safe dose of a drug. 4  Patients feel safe and are more likely to trust medicines if they know they have been tested on animals first.erhaps the law could be changed so that animal testing was optional, rather than compulsory. Scientists could decide not to test drugs on animals if they knew that it was safe to do so. We would need alternatives to animal testing, which could safely test drugs without harmful consequences for humans.
1 Psoriasis is a common skin condition that can cause a scaly, itchy, red rash to form along the scalp, elbows, and joints.  Seborrheic eczema is a type of eczema that most often affects the scalp and causes redness, scaly patches, and dandruff. It can also occur on the ears, mouth, or nose.
The most common causes of itching are dermatological. Dry skin is the most common cause of itching. Other dermatological causes include various types of dermatitis, which is an inflammation of the skin, commonly known as rash.Some rashes are from eczema, which form small itchy blisters on the skin, usually on the hands and feet. A contact rash, usually an allergic reaction, can also cause considerable itching.A contact rash can occur from contact with plants like poison ivy and poison oak, chemical dyes and synthetic fibers.ther dermatological causes include various types of dermatitis, which is an inflammation of the skin, commonly known as rash. Some rashes are from eczema, which form small itchy blisters on the skin, usually on the hands and feet. A contact rash, usually an allergic reaction, can also cause considerable itching.