Can you pin-point when it was you first noticed these marks? Should the symptoms worsen, try to think what was going on immediately prior in terms of particular foods - where you using quite a bit of moisturiser (more than usual). You also need to be very careful regarding masturbatory practices as this does actually cause a great deal of friction between the different layers of foreskin, and between the foreskin and the glans / head of the penis.
This would not usually be an issue for men that have a completely healthy skin of the foreskin. You obviously have something going on, whether a dermatological issue of some kind, or indeed, whether you actually have Lichen Sclerosus [LS] itself. From the image and your description it does sound like LS to me. It would do you no harm to follow the information I shall re-post below on previous guidance I have given to other men (the specific comments do not apply to you, only the hygiene routine to practice >>>>>>>>
* What I do know is the when you have ANY condition affecting the penis you need to implement squeaky clean hygiene practices to rule out the real possibility that it is simply an irritant creating the condition you have!
The skin on the penis is more sensitive than any other part of the body, particularly the head of the penis. During sex or self-pleasuring there is a whole lot of friction going on for this area of skin - in YOUR CASE if you use condoms, there is often a whole load of chemicals on the inside that certainly don't help if your skin is reacting to irritation!
Try this for a while (2 / 3 weeks) - prevent as far as possible, soap, or shower gel, hair shampoo etc., or skin cream / lotion or any form of lube (oil based particularly) from getting on your penis. Always wash with water ONLY (never hot water) after urinating (in public toilets go in a cubicle and use toilet paper to ensure the head and surrounding area is 100% dry) when showering – if possible, make sure the skin of the penis is drawn forward to cover the head to protect the area from soap / shower gel, etc. getting on it. At the end of the shower - make sure the entire penis is 100% dry afterwards. You can also combine this with giving your penis an 'exercise holiday' - no masturbation or sexual activity, you may need to do this for as long as 5 or 6 weeks.>>>>> {Your penis could simply) be reacting to an irritant, usually some form of chemical - from anything from a specific soap, washing powder you use on your clothes, (and so on) or something related to your sexual practices: lube, lotions, gels, condoms etc. <<<<<<<<
*Hopefully your biopsy will conclude on what exactly you have, until then I would strongly advise putting in place a hygiene practice that works for you. If you ARE confirmed as having Lichen Sclerosus I would suggest you start a new discussion forum on here RATHER than updating this one. As I have been dealing with LS for 7 years+ I can guide you on what worked for me and the best practices to keep it at bay.