Hi , i have a growth on my middle finger for about 3 months now at first the pharmacy said it was a spider bit but till now its still on my finger and is really sore ?

Doc: Have your doc take a look at it. Any type of insect bite should have healed by now. From a cyst to warts among the most common causes, there is a wide variety of possibilities.

See your doctor: Have a doctor look at it. A “growth” is rarely a spider bite but could be any one of many other issues (Herpes infection, wart, etc, etc). You need a doctor to see it, properly diagnose and properly treat