Skin cancer is one of the common causes of bumps. Basal cell carcinoma and squamous cell carcinoma often appear as lumps or bumps on the skin that may be painless and itchless. However, if a bump grows rapidly, has irregular edges, or shows signs of ulceration or bleeding, seek medical attention promptly.
Breast cancer can also present as small, painless, itchless bumps on the skin, usually on the breast or within it. If there are changes in the size, shape, or texture of a bump on the breast, consult a doctor immediately.
Melanoma is a more severe form of skin cancer and may initially present as a small bump on the skin. These bumps might be colored, such as black, brown, or blue. If the color, shape, or size of a skin bump changes, seek medical attention without delay.
Lymphoma can cause lymph nodes to swell, forming small, painless, itchless bumps. These bumps may gradually enlarge. If you notice swollen lymph nodes, particularly in the neck, armpits, or groin, consult a doctor promptly.
Thyroid cancer can lead to thyroid nodules, appearing as small bumps in the neck. These bumps may be painless and itchless, but if a thyroid nodule enlarges rapidly or causes swallowing difficulties or breathing problems, seek medical attention immediately.