arm(s) and leg(s) red

発疹や手にバンプ, 皮膚のしこり, 腫れぼったい顔, redness in skin in one area

かゆみ, 発疹, 発疹や皮膚にバンプ, redness in skin in one area

Atopic dermatitis, sometimes called eczema, is a kind of dermatitis, an atopic skin disease. Atopic dermatitis afflicts humans, particularly young children; it is also a well-characterized disease in domestic dogs. 

乾燥肌, 発疹, 発疹や腕に出会う, 発疹や足にバンプ

Keratosis pilaris (KP) is a very common genetic follicular condition that is manifested by the appearance of rough bumps on the skin and hence colloquially referred to as "chicken skin". It most often appears on the back and outer sides of the upper arms (though the lower arms can also be affected), and can also occur on the thighs and tops of legs, flanks, buttocks or any body part except glabrous skin (like the palms or soles of feet). 

発疹, 発疹や皮膚にバンプ, 皮膚のしこり, redness in skin in one area

Urticaria or hives is a relatively common form of allergic reaction that causes raised red skin welts. Urticaria is also known as nettle rash or uredo. These welts can be 5 mm (0.2 inches) in diameter or more, itch severely, and often have a pale border. 

冷たい手と足, 手が冷たい, 腕に発疹, rash on foot (feet)

Livedoid vasculitis (also known as "livedo vasculitis", "livedo reticularis", and "livedoid vasculopathy") is a vascular disorder mostly affecting women. It may be aggravated by exposure to cold and occurs most often in the lower extremities. 

しこりや顔の腫れ, 発疹や皮膚にバンプ, 腕に発疹, 顔の発疹

The female mosquito (in almost all species) sucks the blood of mammals, including humans. Mosquito bites often swell up hours after happening, causing a red ringed white bump about a centimeter in diameter. 

呼吸困難, 腫れぼったい顔, 腫れフィート, 腫れ足と脚

Angioedema (BE: angiooedema), also known by its eponym Quincke's edema and the older term angioneurotic edema, is the rapid swelling (edema) of the skin, mucosa and submucosal tissues. Apart from the common form, mediated by allergy, it has been reported as a side effect of some medications, specifically ACE inhibitors. 

発疹, 発疹や皮膚にバンプ, 腫れぼったい顔, 頭痛

A food allergy is an exaggerated immune response triggered by eggs, peanuts, milk, or some other specific food. ... 

発疹, 足や手に潰瘍, 足足に潰瘍, redness in skin in one area

Raynaud's phenomenon (RAY-noz), in medicine, is a vasospastic disorder causing discoloration of the fingers, toes, and occasionally other extremities, named for French physician Maurice Raynaud (1834 - 1881). 

いくつかの関節の痛み, 皮膚のしこり, 足にあざ, redness in skin in one area

A bruise or contusion or ecchymosis is a kind of injury, usually caused by blunt impact, in which the capillaries are damaged, allowing blood to seep into the surrounding tissue. They often induce pain but are not normally dangerous.