I'm so sorry to hear your husband has advanced melanoma. Are his clinical team aware of the lumps and have they a treatment plan in place?

I'm afraid I can't answer your question as to whether they will leak or bleed but I urge you to contact his nurse or consultant to get advice on what to expect and how to deal with them. I will send you a friend request. If you accept it we can talk by private message but meanwhile, please talk to his clinical team. 

Angie (Stage 3 melanoma patient since 2009)

Hi Angie, thanks for your reply . My husband, Brian, is now stage 4-5 having had tablets for 13 cycles and 3 lots of immunotherapy. He also has Parkinson’s so it limits treatments too. The last CAT SCAN, in September 2023 showed that it had spread even more. 
since posting I have had home visits from various agencies including the GP!! and the palliative team who have explained everything , and what to expect, his life expectancy is limited and he has come to terms with this mostly now.

I hope your recovery carries on for you x