It could be a viral infection known as molloscum contagiosum. But clear photographs are need to confirm it. Just by description no body can be sure.
Next Steps
consult near by dermatologist for confirmation of your condition and if it is molloscum it will require removal by co2 laser or electro cauterization to prevent further spread on other body parts and to other family members, especially kids as it is contagious and spread by skin to skin contact of affected area.
Health Tips
it may resolve spontaneously but by that time it may spread to other parts or to someone you care.