I am worried about this bump on my forehead. The more weight I gain the bigger it gets. I've had it for 3 years now. (Photo)

Lipomas do not 'burst'.  You may have had a cyst and how you're left with a depression in the thigh?  You can let it be or have it excised but that will leave a scar.  What's better?  Scar or the current depression?  Only you can decided

You would need to be examined to determine the extent of any hematoma you may have after removal of a lipoma on the back of your head.  If you do still have a hematoma 2 weeks after surgery, it is possible that some of the fluid could be removed by aspiration with a syringe and needle....

Not really although, in general, we advise against using any products that interfere with the blood clotting process for a period of at least three weeks before and after surgery.  These include aspirin, NSAIDs, Vitamin E, gingko biloba and a wide range of products that contain them, or...

Lipomas are benign fatty tumors that occur under the skin and less commonly within the muscle. They are associated with mild discomfort and a lump underneath the skin. It is always best to talk to an expert plastic surgeon to determine whether the lipoma is possibly a cyst or a tumor or hernia....

I don't have a clear answer but multiple lipomas such as you describe are exactly that - multiple and, often, painful.  That's because unlike single lipomas, which are typically made of loose, fatty tissue, the multiple form is usually denser, with more fibrous and vascular tissue and, upon...

Lipomas are benign fatty tumors that occur underneath the skin. Most lipomas require surgical removal once they are bothersome. It is important to make sure that the growth is not something else before assuming it is a lipoma. There are many other subcutaneous nodules that mimic lipomas in shape...