I read inflammatory breast cancer can look like a bug bite on the breast? How quickly does it spread externally from there?

Quickly. Inflammatory breast cancer is an aggressive type of breast cancer. If you see skin changes on the breast, then see you doctor immediately.
Not a bug bite. Unusual rare form of breast cancer. Diffuse redness and swelling of the skin of the breast. Need to see a doctor for an exam.
Not usually. Inflammatory breast cancer may present like an infection in the breast with swelling and redness with thickening and dimpling of the skin. It is unusual for patients not to seek medical help in these situations. The danger is that the doctors may miss the diagnosis if they don't pay attention and order the right test or referral.
Breast cancer. Please see a dermatologist, breasr sureon, or plastic surgeon for an evaluation and biopsy of the skin if necessary.

Related Questions

Is breast pain associated with inflamitory breast cancer?

Symptom. It can be a symptom of such, but it is more common a symptom of several other conditions. Get an evaluation to be sure of what is causing any breast pain. Read more...
Can be. As a general rule breast cancer is not painful, and pain does not mean cancer; however, there exceptions to the rule. Inflammatory breast cancer can often be pain. Read more...
Not necessarily. In fact a breast that is red and swollen without pain is inlammatory breast cancer till proven otherwise. Read more...
Not always. Inflammatory breast cancer is a "clinical diagnosis", meaning it is diagnosed based on the appearance of the breast - classically warm, red, with skin thickening, mimicking infection. It is often tender, but not always. Read more...

3 bug bite-like spots on side of left breast since 3days ago. 2 more appeared today. Red and itchy. Inflammatory breast cancer?

No , unlikely. at your age , it presents as painless inflammation ( redness and swelling , some times show dimples like in an orange skin , Go to your doctor get it checked as you said it could be simple bug bites . Read more...

I have a bug bite like little red bump on my breast. It does not itch and feels like a blister to touch. I am currently breastfeeding my 3 month old. Not mastitis. Could it be inflammatory breast cancer?

Need more detail... The surest thing to do is have doctor review a detailed history and examine the concerned area as soon as possible as described in articles listed in http://formefirst.com/onDealSickness.html. By what you described, your worry for inflammatory breast cancer is premature and unnecessary. But if indeed related to a recent insect bite with no allergy, it should spontaneously resolve in 3-7 days.... Read more...

What does breast cancer look like on a pet scan?

Frequently light up. Breast cancers frequently light up on pet scan but the purpose of the scan is usually to look for metastases, not look at the actual breast tumor. Small tumors, including in the breast or metastases, may not be seen on pet scan so while a positive scan confirmed with biopsy means there is a metastasis, a negative scan does not automatically mean that you don't have a metastasis. Read more...

Does inflammatory breast cancer look like dermatitis? Or it is just swollen and red, like mastitis?

Like mastitis. It is red, thickened and can look like an orange peel. Referred to as peau de orange. Hope this helps. Read more...
Breast cancer. If you have dimpling like the surface of an orange. If you have this you have to be seen by a breast surgeon and a medical oncologist. Read more...