A fleshy lump has appeared on my shoulder, resembling a mole. What could it be, and what should I do?

A fleshy lump has developed on the shoulder, resembling a mole. It could be caused by common warts, molluscum contagiosum, flat warts, or other conditions, and timely medical treatment at a hospital is necessary. Specific causes are as follows:

1. Common Warts

These are typically benign epidermal tumors caused by human papillomavirus (HPV), presenting as papilloma-like hyperplastic lesions. When the aforementioned symptoms appear, treatment under a doctor's guidance may include topical application of imiquimod cream or Wumiao Shuixian ointment.

2. Molluscum Contagiosum

This is usually a contagious skin disease caused by the molluscum contagiosum virus. The characteristic skin lesions are waxy, shiny papules or nodules from which a cheese-like molluscum body can be squeezed out. Treatment under medical supervision may include cantharidin cream or acyclovir cream.

3. Flat Warts

These are typically viral infections caused by human papillomavirus. Skin lesions mainly present as small, rice-grain-sized papules. Under a doctor’s guidance, topical treatments such as isotretinoin erythromycin gel or fluorouracil ointment may be applied.

In addition to the above causes, the lump could also result from sebaceous gland tumors, soft fibromas, lipomas, or similar conditions. It is important to wear loose, comfortable clothing and avoid prolonged friction.