Pimples below the collarbone may be caused by acne, folliculitis, contact dermatitis and other diseases.
1. Acne: Acne is a common chronic inflammatory follicular sebaceous gland disease in dermatology, which is related to the overproduction of sebaceous glands, abnormal keratinization of follicular sebaceous gland openings, and the infection of Propionibacterium acnes, etc. Acne can occur below the collarbone, and the degree of severity may be mild or severe, and can be localized to appear pimples, inflammatory papules, pustules, nodules, and cysts.
2. Folliculitis: Folliculitis is an inflammatory disease of the hair follicle and its surrounding tissues caused by bacterial or fungal infections. If local scratching leads to small skin injuries, the pathogenic bacteria invade the hair follicle, leading to hair follicle and its surrounding tissues to appear inflammation. It is localized red papules, pustules, accompanied by itching or pain.
3. Contact dermatitis: allergic patients below the collarbone in contact with allergens, but localized erythema, pimples, papules, with intense itching or pain, common allergens, including metal necklaces, detergents and so on.
Acne under the collarbone may also be caused by other diseases, it is recommended that patients do not scratch the stimulus, go to the regular hospital dermatology consultation in a timely manner, clear causes and then symptomatic treatment.