Splitting of skin on the thumb is a common medical problem that generally occurs in physically active people who work with their hands or who exercise outside or who are exposed to irritants. Occasionally the condition requires medical treatment. The physicians who are best qualified to discuss this issue with you include your primary care physician
or your family medicine doctor
Splitting of the skin on the hands and fingers is largely cause by dry skin, which can be worsened by hard manual labor and cold weather, both of which further dry out the skin.
Your doctor will likely advise you that keeping the skin well protected by wearing gloves at all times while working is a key to proper healing. Furthermore, application of a barrier cream, such as a product containing petroleum, at very frequent intervals throughout the day may be advised to keep the skin moisturized.
Occasionally, the split areas of skin can become infected. In this case, application of a topical antibiotic cream may be indicated.
As always, the diagnosis and management of your specific condition will require a physical examination by your personal physician. Scheduling an office visit with your primary care doctor or family medicine doctor is recommended.