Hai, 1. Small lump on your palm (not on the dorsum side) of your hand which is painless can be thickening of the palmar fascia - Dupuytren s contracture or it can just be a small callosity due to friction, 2. Cause is mostly unknown, but is associated with alcohol, liver diseases, diabetis mellitus, etc. 3. Dupuytren s contracture may lead to limitation of finger movements which might require intervention like local steroid/ collagenase injection or surgical release, 4. Taking an Xray of hand will help us rule-out other possibilities arising from the bones, 5. Physiotherapy might help you to maintain mobility of fingers. You can continue to routine activities.