Hey, Thanks, I live in Barbados and all plants were planted from seeds. Seeds came from our mother plants so no imported seeds. Our Adeniums have perfect conditions in sunny Barbados. There are many plants having this, not sure what that is. I checked on internet and there is no info...

Maybe some type of gall?

Liz, I think you are right. I did a bit of research about it and it looks like a gall. I wonder what can cause it on Adenium Obesums??? and will it add some nice characteristics to the plant or shall I treat it with something? It looks nice red and with age it may create nice swollen branch on Adenium. Not sure what to do with it.

Galls can be caused by pests, viruses, and other things, but I'm not sure if anything specific is known to cause them on Adenium. Can't seem to find much info on the topic. I'm not sure what to do with it, either. :(

Here's an old thread click me where the poster was advised to prune the plant to remove the gall.

Also, if you have several plants with this problem it might be worth having the plants inspected and/or tested by your local agricultural extension (not sure if that's what it's called in Barbados) or university to see what's going on.

One more thing lol...here is a thread click me from the cactus and succulent forum that's pretty interesting (and gross). Not saying that this is what's going on with your plants, just wanted to link it as further reading on weird things that happen to plants.

Liz, Thank you so much, links you added are great too...for sure it’s a gall, I will prune affected parts and it should be ok. Adeniums get better when pruned so it should not be problem but I will investigate whole thing and will post some updates. Thank you once again. Cheers!

You're welcome :)