red hot blotchy skin

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What causes a rash,red, blotchy, then solid red, on trunk, chest. not itchy.hot. no new products on skin or injested.

See Dr.

Rash
Unfortunately, rashes are almost impossible to diagnose over the computer. There are multiple causes of rashes, ranging from various allergies to diseases such as lymes, etc. The rash could be somehting simple or something associated with an other underlying condition. See a Dr. to get a clinical exam, as the majority of rashes are easy to treat once properly diagnosed. Goodluck.
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Dr. Liawaty Ho answered:

My skin is extremely itchy and hot, and tiny bumps and red/purple/black blotchy bruises appeare after it stops itching. What could it be? Please help?

Need eval

Itching
you should see your PCP and get further evaluation. there are many things causing itchiness on skin from dry skin, skin allergy, skin infection, drugs, diabetes, kidney disease, certain primary bone marrow problems etc. get yourself checked.
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Dr. Raja Abusharr answered:

Face is red and blotchy after a warm shower, what can i do to help the redness go away? Take an antihistamine? No i dont have rosacea

Flushing of face

Rosacea
Common problem and related to (1) rapid dilation of superficial blood vessels called capillaries that increase in diameter and blood flow in response to heat. With dilation, the body cools down by running more blood through the surface of the skin and it transfers heat away from the body (2) release of chemicals in mast cells that an antihistamine could block if you take it regularly.
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Dr. Payam Rafat answered:

What causes server swelling in left foot and ankle with pain and blotchy redness in foot, ankle area up to 4 or 5 inches or more up your leg Twice now?

May not be related.

Ankle_pain
Your pain could be as a result of many different things. A thorough history and physical exam and possibly some laboratory and radiology exams are needed to determine the exact cause. Causes of pain may include: Trauma (fracture, sprain, arthritis), infection, metabolic conditions (gout), circulatory, musculoskeletal or biomechanical abnormality and Neurologic conditions (neuropathy).
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sudden feeling of hot mouth and skin. no rash or redness. what can cause this?

Niacin

Head-mouth
Are you taking Niacin?
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Dr. John T. Chiu answered:

I get this red blotchy hive/rash on my chest and neck when i am extremely nervous, excited, hot and also after sex. please help?

Cholinergic urticari

Urticaria
This is known as cholinergic urticaria arising during the cooling phase after a rise in core body temperature. You may try taking an antihistamine about 2 hrs prior to sex or exercise in the future. Avoid Benadryl if you plan to have sex but the other AHs are usually ok.
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I've a rash appeard today on both arms but worse on one, its red blotchy and a little warm. Looks like prickley heat but I'm not hot?

Depends

Rash
it's hard to tell without seeing in person.
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turn bright red and blotchy and hot, sweaty when I indulge in any alcoholic drink or am very nervous.. Not rosachea. I have asthma (see dr.)?

Alcohodehydrogenase

Redness
Many people, especially Asians and Native Americans lack an enzyme needed to digest alcohol. Using alcohol causes these people to get flushed, and they require much lower amounts to get intoxicated Be careful and safe
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Dr. William Gaya answered:

Can Lupus cause palms of hands and feet to get real red/blushed , sometimes blotchy and sometimes they feel "Prickily" when they are red/hot.

Neuropathy

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It is possible. However blotchy prickly hands or feet with hot sensation are not specific findings of a particular disease. Other conditions like Raynaud phenomenon or autonomic nervous system dysfunction or Neuropathy can cause this presentation. Consider checking your sugar and vitamin B12 levels. Please check with your physicians for proper diagnosis and treatment. I hope you feel well soon.
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My chest/neck breaks out in red blotchy spots when I'm nervous/excited. No itching, but I get VERY hot. Anything I can do to prevent this? Thanks!

Maybe

Itch
With nerves there are some techniques that may help when it starts to occur. Look up, and learn to use a few breathing techniques. Come up with a calming saying or prayer you can say to yourself to help you calm down. Not sure I'd suggest med tx unless it's a big problem for you. Consider this too: is it a huge deal? Accepting that it happens might take away some of the anxiety & even decrease sx
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