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Hives (urticaria) are an inflammation of the skin that causes red, raised welts or bumps. Hives itch, and they tend to come and go in groups. A petechial rash looks like pin-prick red or purple spots on the skin, and can resemble flea bites. ... them support if they or their loved ones are affected. It's likely to be an infection if the skin around the lump is red and warm. ... Lump on the shoulder, back, chest or arm. A lump on the shoulder, back ... Oct 24, 2024 ... Bumps on the arms often result from keratosis pilaris, commonly known as chicken skin. Other possible causes can range from inflammatory skin conditions to ... Mar 14, 2025 ... It's characterized by red bumps on the chest and back, which may spread to the arms and legs over the following days. As they get better ... Jul 1, 2023 ... The allergic reaction is often delayed so that the rash may not appear until 24 to 48 hours after exposure. The rash may: Have red bumps that ... May 9, 2024 ... They then spread downward to the neck, trunk, arms, legs, and feet. Small raised bumps may also appear on top of the flat red spots. The ... Feb 9, 2022 ... The bumps can be skin-colored or shades of white, brown or red. ... those with fair skin and those who have the bumps on their face. In ... ... red, itchy rash that sometimes comes with small blisters or bumps. ... Illustration of a mom holding a tablet while showing her daughter the kids outside, while. Keratosis pilaris consists of small, rough, white or reddish bumps or patches on the skin. Read about the causes, symptoms and treatment here.