Hi, thanks for your query. Stretch marks are a common condition and occur due to rapid weight gain or weight loss. They are present in almost every individual to some extent. These are in the form of linear marks. Stretch marks per say are not the only feature of ehlers danlos syndrome. It is a genetic disorder. Mostly family history is positive. It has involvement of internal organs as well as skin. Skin changes are stretchy skin with a velvety texture, fragile skin that tears easily, easy bruising, abnormal wound healing and scar formation, widened atrophic scars, redundant skin folds. The above features are not present in your case or your brother so don t worry you are not having this syndrome. Stretch marks can be reduced by procedures like lasers, micro dermabrasion, peels etc. You may meet a dermatologist for the same. Hope this relieves your anxiety. Take care.