blister(s) or bump(s) on arm(s)

blister(s) or bump(s) on skin, itching, rash, redness in skin

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. ... 

a painful swelling in skin, blister(s) or bump(s) on skin, lump(s) in skin, redness in skin

Boil or furuncle is a skin disease caused by the inflammation of hair follicles, thus resulting in the localized accumulation of pus and dead tissues. Individual boils can cluster together and form an interconnected network of boils called carbuncles. In severe cases, boils may develop to form abscesses. ... 

blister(s) or bump(s) on skin, itching, lump or swelling on leg(s), lump(s) in skin

blister(s) or bump(s) on arm(s), blister(s) or bump(s) on leg(s), rash, redness in skin

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). Less commonly, lesions appear on the face and may be mistaken for acne. ... 

blister(s) or bump(s) on skin, itching, lump(s) in skin, rash

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. Urticaria is generally caused by direct contact with an allergenic substance, or an immune response to food or some other allergen. Hives can be caused by stress. ... 

blister(s) or bump(s) on skin, rash

Molluscum contagiosum (MC) is a viral infection of the skin or occasionally of the mucous membranes. MC infects humans, other primates and kangaroos. The infecting virus is a DNA poxvirus called the molluscum contagiosum virus (MCV). There are 4 types of MCV, MCV-1 to -4, with MCV-1 being the most prevalent and MCV-2 seen usually in adults and often sexually transmitted. The incidence of MC infections in young children is around 17% and peaks between 2-12 years of age. MC affects any area of the skin but is most common on the body, arms, and legs. It is spread through direct contact, saliva, or shared articles of clothing (including towels). ... 

blister(s) or bump(s) on skin, itching, rash, vaginal or vulvar itching or irritation

Scabies is a transmissible ectoparasite skin infection characterized by superficial burrows, intense pruritus (itching) and secondary infection. The word scabies is Latin for "itch". ... 

blister(s) or bump(s) on skin, pain in skin, redness in skin, scaly patches on skin

Burns can be caused by dry heat (like fire), wet heat (such as steam or hot liquids), radiation, friction, heated objects, the sun, electricity, or chemicals. ... 

blister(s) or bump(s) on skin, itching, rash, redness in skin

Contact dermatitis is a term for a skin reaction resulting from exposure to allergens or irritants. Phototoxic dermatitis occurs when the allergen or irritant is activated by sunlight. ... 

blister(s) or bump(s) on skin, hives, red streaks on skin