Hi, Thanks for writing in. A single hair growing on a mole with no other change in appearance is less likely to be a cancer. However, it will help to see the mole clinically and then make a confirmation. The size and growth of the mole in recent times is also important. If it is a small mole then I suggest you closely observe the mole by either asking your relative to check it every 3 months or take a picture and compare each time to see any changes in appearance. For larger moles it is better to consult a dermatologist and take a clinical opinion and if required a skin biopsy from the mole. This is a painless procedure and done to look for cells in the mole with signs of cancer. You can also get your mole removed completely by getting radiofrequency ablation sessions. This requires few sessions and is a permanent procedure done by the dermatologist. Please do not worry.