The common causes of acne near the collarbone are acne, folliculitis, contact dermatitis and so on. 1. Acne: In normal life, people stay up late for a long time, do not get enough sleep, often intake of spicy and stimulating food, can lead to the phenomenon of acne near the collarbone. 2. Folliculitis: If you don’t clean the area near your collarbone for a long time, it is easy to get infected with bacteria and fungi to induce folliculitis, forming red papules and white pus pimples. 3. Contact dermatitis: if the clavicle position using irritating or unused cosmetics, easy to cause contact dermatitis, the main clinical manifestations of erythema, papules, blisters, itching and other symptoms. When the patient appears near the clavicle acne phenomenon, it is recommended to consult a doctor in a timely manner, under the guidance of a professional doctor to clarify the diagnosis, standardized treatment.