Apparently more common in younger women. I hope you ask a doctor who can determine if you have it!
https://www.mayoclinic.org/diseases-conditions/inflammatory-breast-cancer/symptoms-causes/syc-20355413
Risk factors
Factors that increase the risk of inflammatory breast cancer include:

Being a woman. Women are more likely to be diagnosed with inflammatory breast cancer than are men — but men can develop inflammatory breast cancer, too.

Being younger. Inflammatory breast cancer is more frequently diagnosed in people in their 40s and 50s.

Being black. Black women have a higher risk of inflammatory breast cancer than do white women.

Being obese. People who are obese have a greater risk of inflammatory breast cancer compared with those of normal weight.