A lump under the foot is an abnormal growth or swelling that can occur in various areas, such as the arch, heel, or ball of the foot. This lump may vary in size, texture, and tenderness and can be associated with discomfort or pain, particularly when walking or standing. The lump can be caused by several conditions. Common causes include plantar warts, which are caused by a viral infection in the skin, resulting in a hard, often painful growth on the sole of the foot. Another possible cause is a plantar fibroma, a benign tumor of the connective tissue in the foot's arch, leading to a firm, non-tender lump. Bursitis, particularly in the heel (heel bursitis), can cause swelling due to inflammation of the bursa, a small fluid-filled sac that cushions the heel's bony prominence. Additionally, conditions like Morton's neuroma, which is a thickening of the tissue around a nerve between the toes, can cause a lump and pain in the ball of the foot.
Treatment for a lump under the foot depends on the underlying cause. For plantar warts, over-the-counter treatments like salicylic acid or cryotherapy can be effective, although persistent cases may require professional removal. Plantar fibromas may not require treatment unless they are painful, in which case corticosteroid injections or surgical removal might be considered. Bursitis can be managed with rest, ice application, and anti-inflammatory medications. Morton's neuroma may benefit from changes in footwear, padding, or corticosteroid injections. Consulting a healthcare provider is important for accurate diagnosis and appropriate treatment, especially if the lump is painful, growing, or affecting mobility.
