Doctor insights on:
What's The Difference Between A Rash And Hives
Big difference: Rosacea tends to be a reactive process in response to various stimulants that may eventually produce long term skin changes such as rhinophyma that are commonly treated with avoidance and antibiotics whereas lupus is associated with a "butterfly" rash that is a manifestation of an underlying autoimmune disease that are commonly treated with steroids. ...Read more
Hives last < 1 day: Hives & insect bites itch but otherwise are very different. Bites last for days. A hive fades away in hours although it may be replaced by other hives. Tick bites are usually solitary; you'll usually have a lot of hives. Bites are red, raised, hot & hard. There may be two indentations close together where the tick inserted its teeth. Hives are raised, warm with pale centers and red edges. ...Read moreSee 1 more doctor answer
Caused by heat: Heat rash is caused by heat. It has a variety of presentations, most common being red bumps with small vesicles that are easily ruptured. Contact dermatitis is extremely itchy and is localized to areas that are exposed to the offending agent. It is always red and swollen and sometimes has small vesicles with the affected area. ...Read more
Diaper rash: is a generic term, can include allergic reaction (allergic contact dermatitis) to the diaper material, rare, most commonly is a fungal infection to the diaper area due to wetness, after antibiotics usage, etc., your best bet is to keep the area as dry as possible and use protective creams, if the rash persists please see your doctor ...Read more
Both signs of allerg: Dermatographism is the welting up of skin when it is stroked with a dull object such as a fingernail. The welt will be exactly the same pattern as what is "drawn" on the skin. Hives are spontaneous welts, usually circular that occur when someone is exposed (usually by eating) something they are allergic to. They are both seen in allergic people. ...Read moreSee 1 more doctor answer
May be related: As the skin breaks down with any irritation or rash, it may become secondarily infected with bacteria such as staph. Since MRSA is now frequently found in skin infections, it is commonplace to treat all suspected staph infections as if they were MRSA until the culture results are available. Always try to keep skin dry and clean. Keep in mind that most "wipes" will not cleanse skin well. ...Read moreSee 1 more doctor answer
Insect vs fungus: Bedbugs are small blood sucking insects that like to feed at night & may leave multiple inflamed bite wounds on your body where they fed. Ringworm occurs when fungal spores settle in the top layers of skin and eat older top skin layers in an expanding circle.The outer ring of the ringworm is where active growth occurs, while the pale inner skin is healing. ...Read more
Few similarities.: Roseola is a viral infection affecting infants and young children. It involves a pinkish-red skin rash and a high fever that typically starts as the rash is resolving. Psoriasis consists of well-defined red plaques with silvery scales. There are many kinds of eczema, which is characterized by a diffuse reddish scaly itchy rash in various locations (depending on the type and severity). ...Read more
Unclear: Even for medical experts, it is sometimes difficult to distinguish between different types of rashes in general. Sometimes, a skin biopsy needs to be done so that a piece of the skin can be studied under the microscope to determine the exact nature of a rash. See your doctor if you have a specific question regarding a rash. ...Read moreSee 3 more doctor answers
Overlapping symptoms: There are overlapping symptoms between the common viral cold, sinus infections and allergic rhinitis (allergies) for an easy to use chart, go to my blog and read. http://www.familyallergyasthmacare.com/2013/02/is-it-a-cold-sinus-or-allergies/ In a nutshell, itching (nose, eyes, palate) makes it more likely to be an allergy. Fever makes it most likely to be an infection. ...Read more
Hay fever vs cold: From a practical perspective, the symptoms of both of these disorders are the same--runny nose and sneezing, perhaps also with itching, running eyes. The difference is that a cold will only last 3-4 days usually, while allergy symptoms tend to be chronic (eg., last all spring). So if your cold symtpoms don't quit after a week, you probably have allergies. ...Read moreSee 1 more doctor answer
Can look similar: To patients, both are dry, flaky rashes that can appear at any age. Psoriasis is more specific, and can involve arthritis. Eczema can simply over dry skin, from irritation, or atopic, e.g. associated w/ asthma and allergies. Psoriasis is oilier, more yellow; outside knees+elbows. Eczema the inside elbows knees. Both on scalp of babies. Eczema really itches. Psoriasis only sometimes. ...Read more
Scabies: Scabies has the following:itching, especially at night rashes, especially between the fingers sores (abrasions) on the skin from scratching and digging thin, pencil-mark lines on the skin mites may be more widespread on a baby's skin, causing pimples over the trunk, or small blisters over the palms and soles. In young children, the head, neck, shoulders, palms, and soles are involved. ...Read more
Hi! Could you tell me the difference between the symptoms of pityriasis rosea and parapsoriasis? How common is each rash and the prognosis? Thanks!
Similar appearance: The palisading variant of small-plaque parapsoriasis is particularly similar to pityriasis rosea. Several salmon-colored patches with a fine scale at the edge can occur scattered over the trunk and extremities. Large plaque parapsoriasis has larger arching appearance and is more distinct. Pityriasis rosea is more common, benign and limited to 10-20 days vs months for parapsoriasis. See derm. ...Read more
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