What Causes Lump On Breast With Green Pus And Blood Oozing?

i have had a lump on my left breast for 2 days now and it has burst.Alot of green pus and blood has come from this.The outer part of the lump is ever so tender and the breast is painful aswell.Should i go and see my GP as this is the 3rd time of having a cyst.

Where the cyst is growing is where i had surgery 2 yrs ago to remove one which was a success,I am very worried