I have mole on arm, i've had for 5 years. it gets red and itchy & swells then goes to normal. is it normal since it returns to normal? it is very smal

See a dermatologist: I recommend going to see a dermatologist since I am not there to actually see it. The abcdes of melanoma are:a=asymmetry(one half unlike the other half), b=border (irregular, scalloped, poorly defined border), c=color (varied from one are to another), d=diameter (while melanomas are usually greater than 6mm they can be smaller when diagnosed), e=evolving(change in size, shape, color).See a dermatologist.

Mole on arm: Please be evaluated by dermatology asap. It may be nothing but only a histopathologic diagnosis will tell for sure. Good luck!