There's a pus-filled lump on the hand.

Pus-filled lumps on the hands are usually caused by conditions such as eczema, folliculitis, or boils. Patients should seek medical guidance and use appropriate medications accordingly. Detailed analysis is as follows:

1. Eczema

Eczema is commonly associated with allergies or infections. When it occurs on the hands, localized skin lesions such as papules or vesicular papules may appear, containing inflammatory exudate, accompanied by symptoms like stinging pain, itching, and oozing. It is recommended that patients follow medical advice to apply topical medications such as halometasone cream or calamine lotion to alleviate symptoms.

2. Folliculitis

When hair follicles on the hands become infected with bacteria, red papules appear on the skin surface, containing inflammatory secretions, along with swelling, tenderness, and pain upon touch. Patients are advised to use topical medications such as fusidic acid cream or erythromycin ointment under medical supervision.

3. Boils (Furuncles)

A boil is a purulent infection occurring in the hair follicles of the hand. It presents as a red papule with a yellow pus-filled tip on the surface, which may discharge pus when squeezed, accompanied by pain and localized skin warmth. Patients should use topical treatments such as mupirocin ointment or chlortetracycline hydrochloride ointment under a doctor’s guidance to improve symptoms.

Besides the common causes mentioned above, other possible factors include dyshidrotic eczema, tinea manuum, palmoplantar pustulosis, or pemphigus. Patients should seek timely medical attention to avoid delays in diagnosis and treatment.