A small lump has appeared under the skin on the top of the foot, but it is neither painful nor itchy.

A small lump under the skin on the top of the foot that is neither painful nor itchy may be caused by conditions such as syringoma, lipoma, or wart. Patients should seek appropriate treatment based on the specific underlying cause.

1. Syringoma

Syringoma is a benign skin tumor commonly found on the palms, soles, and the dorsum of the foot. It presents as small granular nodules beneath the skin, typically without pain or itching. Observation over time is recommended; if there are no significant changes, treatment is usually unnecessary.

2. Lipoma

Lipoma is a benign soft tissue tumor frequently located in subcutaneous tissues. It appears as a small, granular mass under the skin and is generally painless and non-itchy. If the lump affects appearance or causes discomfort, surgical removal may be considered under medical guidance.

3. Wart

Warts are skin lesions caused by human papillomavirus (HPV) infection, commonly occurring on the hands, feet, and dorsum of the foot. They appear as small granular growths on the skin and are usually not painful or itchy. Treatment options such as cryotherapy can be administered under a doctor's supervision.

In addition, the lump could also result from other conditions such as ganglion cyst or fibroma of the tendon sheath. Patients should maintain local cleanliness and avoid excessive friction to prevent worsening or recurrence of the condition.