<s>[INST] I now have a shingles outbreak. Previously (4 weeks ago) my dentist indicated a low grade lichen planus round a cracked tooth with large filling. Blood tests showed a very low grade lichen which he seemed to think would eventually go away. Would their be a link here between the shingles and this dental problem? [/INST] Hello, I have read your concern. The lesions of lichen plans arose from the cracked tooth filling. There is no direct relation between lichen plans and shingles. I would advise you to maintain oral hygiene well. Apply topical steroid on the affected area. Avoid spicy foods. Filling of cracked tooth has to be replaced at the earliest. Vitamin A as well as folic acid supplements has to be administered. Hope this helps. </s>