Most melanomas will develop from a new or existing mole and exhibit some tell-tale signs in the process. However, other melanomas may appear as something we can easily write off as harmless. For example: a blood blister – nodular melanoma is one such example.
What is nodular melanoma?
Nodular melanoma is a type of melanoma that grows downwards into the skin in a vertical fashion. This means it can be difficult to see changes developing, as most of the growth is happening below the surface. In Australia and New Zealand nodular melanoma accounts for around 15% of all cases of melanoma. Also, it is more common in fair-skinned people and men.
Nodular melanoma symptoms
Nodular melanoma will often appear as:
- A new mole, blemish or bump that is not normal for your skin
- An increase in the depth or height of an existing mole, especially if it comes with no other warning signs.
- The beginning of a bump that looks like a clear bubble or blood blister on the skin and continues to grow after the first 3 weeks.
- A lump that feels firm to the touch.
A nodular melanoma is more likely to grow as a new mole or discoloration and less likely to involve a change in an existing mole – but the latter can happen. Nodular melanomas will typically be black, blue-black, dark brown or brown-red in color. However, sometimes they can also be red or flesh-toned.
How to tell if it’s a blood blister or melanoma
The only way to know for sure if it is a blood blister or melanoma is to have the bump examined. This can be done by visiting your doctor or dermatologist. If you don’t typically get pimples or didn’t have any injury that would have caused a blood blister, there is more cause for concern. Also, note how the mark develops. If it hasn’t gone away after two to three weeks, you should definitely get it checked out.
Read more: What is Skin Cancer?
While your lesion may be harmless, it’s always better to be safe than sorry. If you have any suspicions, be vigilant and have it examined. Don’t be afraid to get a second opinion either. Catching melanoma early greatly increases chances of survival.