Keratosis Pilaris: This condition is characterized by the appearance of small, rough bumps on the skin, often on the arms, legs, buttocks, and cheeks. It is a common and harmless condition that can be caused by dry skin, genetics, or vitamin deficiencies.

Folliculitis: An inflammatory condition affecting the hair follicles, leading to small bumps or pus-filled pimples. It can be caused by bacterial, viral, or fungal infections.
Pityriasis Rosea: A skin condition that starts with a single, large spot (herald patch) followed by an eruption of smaller spots, often on the trunk and limbs. The cause is unknown, but it is thought to be related to viral infections.
Eczema (Atopic Dermatitis): A chronic skin condition characterized by dry, itchy, and inflamed skin, which can lead to the formation of small bumps.

Meningococcemia: A severe and potentially life-threatening infection caused by the Neisseria meningitidis bacteria, which can cause a rash of small bumps or spots. Early recognition and treatment are crucial.
Syphilis (Secondary): A sexually transmitted infection that can cause a rash of small bumps or spots on the skin, often accompanied by other symptoms like fever and swollen lymph nodes.
Leukemia Cutis: A rare condition where leukemia cells infiltrate the skin, causing small bumps or lesions. It is a sign of advanced disease and requires immediate medical attention.

Sarcoidosis: A condition characterized by the growth of granulomas (inflammatory cells) in various parts of the body, including the skin, which can cause small bumps or lesions.
Lichen Nitidus: A rare skin condition that causes tiny, shiny bumps on the skin, often on the arms, legs, and chest.
Papular Urticaria: A skin condition caused by an allergic reaction to insect bites or other stimuli, leading to small, itchy bumps on the skin.