There are small raised bumps on the skin, and white material can be squeezed out.

Generally, small raised bumps on the skin that discharge white material may be caused by factors such as sebaceous granules, closed comedones, milia, folliculitis, or sebaceous cysts. These conditions can be improved through general treatment, medication, surgical treatment, and other approaches.

1. Sebaceous Granules: Sebaceous granules are small particles formed by excessive secretion from sebaceous glands on the skin surface, which can block pores. They may discharge white secretions when squeezed. Under sterile conditions, a needle can be used to open the lesion and expel the granular material. Afterward, it is important to keep the skin clean and dry to prevent infection.

2. Closed Comedones: Closed comedones are a type of chronic inflammatory skin disease occurring in the pilosebaceous follicles and represent a typical early skin lesion of acne. Topical medications such as adapalene gel or tretinoin cream (retinoic acid-type drugs) can be used as directed by a physician.

3. Milia: Milia are typically associated with genetic factors and skin injuries. They are tiny cysts formed by retention of keratinous material within the epithelium of the epidermis, hair follicles, sweat glands, or other skin appendages. As adjunctive treatment, topical medications such as erythromycin ointment or fusidic acid cream may be used as directed by a physician.

4. Folliculitis: Folliculitis is generally associated with fungal, viral, or parasitic infections. It typically presents as red papules, small vesicles, or vesiculopapular eruptions on the skin surface, with redness and warmth around the affected area, and may discharge white pus when squeezed. It is recommended to use topical medications such as compound polymyxin B ointment or miconazole nitrate cream as directed by a physician.

5. Sebaceous Cyst: A sebaceous cyst is a retention cyst formed due to blockage of the sebaceous gland duct in the skin, resulting in gradual accumulation of sebum. It may also discharge white secretions when squeezed. In such cases, cyst excision can be performed under a doctor's guidance to alleviate symptoms.

It is important to maintain skin cleanliness in daily life and avoid using excessively oily skincare products. It is recommended to visit the dermatology department of a reputable hospital promptly for timely diagnosis and treatment. Self-extrusion with fingers is strictly prohibited to avoid infection.