Open sores under breast? (Pics)

So I've just been checking for lumps and am a bit alarmed to have found these two wet looking swollen lumps on the underside of one of my breasts

Unknown: Painful ulcer on the breast

Hidradenitis suppurativa (HS) - NHS

Sore under my breast

The 9 Best Remedies for Intertrigo, or Rashes Under Fat Folds

Rash under breast: Causes, treatments, and more

Rash under breast: Causes, treatments, and more

Weird wound thing on side of breast, should I be worried? NSFW : r

Rash Under Breast: Causes, Treatment, and Prevention

Ulceration of Breast's Skin due to Topical Corticosteroid Abuse