Blotchy skin and hives?

Question: Today my skin broke out in rash, all over my body. It started with like heat spots that would merge together and it was as though a big patch of skin that had swollen up. My skin's all blotchy. It's everywhere, and that's no exaguration -elbows, thighs, knees, wrists, chest, back, neck, underarms, face, stomach an i'm assuming scalp as i keep getting the need to itch!
My skin feels like it's on fire. My wrists have swollen up.

Its around 24 degrees, my friend and family suggested it was due to heat. could be an allergic reaction, but i cant think o anything. My sister had something like this, but on a much milder scale, much milder, she takes tablets which helps, so i took one her tablets today, her skin gets blotchy around her back about twice a month.
when my sister went to the doctor, he didnt have a clue what to do, so i don't see the point of me going.

Any advice?

A side question, what are hives, why do they happen, and what do they luk like?

Answers:
Sounds like hives - take an antihistamine tablet, record everything you've eaten, anything you've changed (detergents, softeners, shampoos, etc.) and call a doc. Could start to affect you INSIDE...

Marina

ps - don't take other people's meds. It's not wise even if the symptoms are the same.

Other Answers:
No

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Please go to an emergency room or try takeing Benadril The antihistimine is used to treat allergies. You are porbably haveing an allergic reaction to some thing you ate or new persciption. Go to the ER if this pesists.

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Hive is a reaction due to allergens in some cases it is due to histines ibreaking down in the system also caused by sexual relation herpes please i'm asking u tyo go to a dermatologist and get tested for skin cancer u should be tested ever 5-10 years for skin cancers

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