Have a mole on my back which had got bigger & feels a bit rough when i runy finger over it.

Biopsy?: You may need a biopsy of this mole, or it could be a seborrheic keratosis- a harmless brown waxy stuck on spot. Have a dermatologist evaluate.

Dermatologist soon.: Moles changing in shape, color or size should be biopsied asap. Most serious is melanoma, but there may be other types, or can be completely benign. Without resection and biopsy , its hard to tell.See a dermatologist.