I have a small patch on the upper right outer side of my breast that's quite itchy, at first i thought it was just eczema but it is quite crusted ?

Better see ur doctor: Needs to be examined, can't give a specific diagnosis/advice based on the description, needs to be seen and felt, besides the history, best wishes

Breast : It’s very unusual for eczema to occur on breast . Certain breast conditions can present as changes in breast skin . Please see your doctor for examination .

Examination needed: May be infected dermatitis but what you're describing isnt entirely typical of the more common nipple eczema. Recommend a GP assessment here as needs to be carefully examined and make sure no other underlying issues in the breast etc. All the best.