text: has anyone ever heard about viking blood that causes a growth in your hand.?   what you are referring to is probably dupuytrens contracture. this is a genetically related trait which causes thickening and lumps in the palmar fascia( a layer of the hand). people with ancestry from england/ireland/scotland/northern europe are more likely to have this problem.  as the fascia thickens, the bands that form can become painful and also pull the fingers into a flexed position. this can be surgically treated by excision of the palmar fascia. this is a detailed big operation, but is safely performed by hand surgeons every day. dupuytrens contracture can recur after surgery, and the severest form, sometimes referred to as a dupuytren's diathesis can be rapidly progressive and deforming. dupuytrens can also be associated with contractures in other fascia, most notably the soles of the feet and a layer of the penis (sometimes called peyronies disease).  if you need assessment, be sure you see someone experienced in hand surgery. many plastic and orthopedic surgeons have a special interest in hand surgery and some have taken an additional year of training to become very proficient in hand surgery.