Limited Reynaud's?

60 F with 3 year history of only her right D4 and left D3 toes turning blue, swelling, then splitting open and new skin forming. This happens ONLY in the winter, and completely disappears in the spring and summer months. No other digits or extremities are affected, she is unaware of any injury, no exotic travel. She had no history of autoimmune disease, no evidence of scleroderma, or Reynaud's anywhere else. ABI and pulse to the area is normal, trial of calcium channel blocker was unsuccessful. Anyone have an idea of what this might be?

Additional Cases

Case 1

Patient reports having this rash for years. Other than occasional itch, that is mild in severity, patient is asymptomatic, with the exception of a few of the lesions on her knuckles, which are tender to the touch. Patient does feel like sometimes the rash moves. She shares that it may also be worse when wet. Per patient, the rash is only on her hands (nowhere else on her body). She denies contacts with a similar rash. Patient received treatment in the past, triamcinolone, but was unable to take it as prescribed and ended up giving the medication to her son for his eczema. Patient believes her rash is likely eczema but would like to rule out scabies as she has had exposure in the past and wants to ensure she does not have a chronic version of it. In terms of history, she has no personal history of skin cancer. She does have a family history of skin cancers.

Case 2

13-year-old school girl gives history of appearance of these lesions only over both feet since 2 days initially associated with itching but not anymore. She also gives history of walking in muddy water on her way to school.

Case 3

31-year-old female came to clinic stating she woke up with this area on her leg. Very pruritic, firm, raised, and warm. The area is on the top of her lower right leg only.

Case 4

A 60-years-old woman with previous history of MS in remission without therapy and well-controlled hypothyroidism, developed this skin change on her left leg one month ago. There is only pruritus, no pain.