Skin rashes on the body

hello ! i need your help please. i have those skin rashes than appeared on my body 1.5 years ago. it is always the same spots : sternum, neck , and some part of my face . it is not permanent : it will stay 3-5 days and then nothing for 3-4 weeks . looks like it is getting worse . i am 41, healthy and fit. i had only one issue 1.5 / 2 years ago and it was acid reflux ( GERD ) due to my stomach but it is fixed now . i have no allergy i think it is linked to an inflamation maybe

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Any advices ?

does it itch? does the rash appear where you have shaved?