Raised 4mm mole on my neck got dry and flacky this week.small black dot occured,i think blood clot.last skin check by derm was one month ago.melanoma?

Likely not.: It is unlikely that any significant change occurred in your skin lesion within one month since the last examination by a dermatologist; nevertheless, anything is possible. It is always wise to have all pigmented lesions evaluated regularly by a dermatologist; if there are changes, a visit or phone call also gives you the opportunity to discuss your concerns with the dermatologist who knows you.

Please consult with a Dermatologist Doctor who can give you a through examination and the correct recommendations and treatment. If you are not confident in your Doctor see another for a second opinion.