The musician was diagnosed with cancer earlier this year.
Mark Hoppus is staying strong amid his cancer battle. On Tuesday, the 49-year-old musician — who was diagnosed with stage 4 large B-cell lymphoma earlier this year — took to Instagram to give fans an update after undergoing his fifth round of chemotherapy.
Sharing a photo showing off his scalp, which is starting to grow back hair, Hoppus wrote:
"Hahaha. Look at this trash. This is the top of my head right now. This is what God sees when He looks down upon His work and despairs. Cancer-ass head trying to grow back some hair. Awww. Poor little head. Keep your chin up, fighter. Feeling terrible this week but trying to stay positive and count my blessings."
"I hope everyone is doing great, staying healthy, and being kind to each other. If anyone needs me, I'll be on the couch for the foreseeable future", he continued.
In late June, the Blink-182 frontman went public with his cancer diagnosis, though he didn't say which type. At the time, he announced on his Instagram Stories that he had been undergoing chemotherapy for the past three months.
During a Q&A on Twitch the following month, Hoppus revealed that he has stage 4 large B-cell lymphoma, which occurs in white blood cells and can form tumors throughout the body. According to Mayo Clinic, it's the most common subtype of non-Hodgkin's lymphoma.
"My classification is diffuse large B-cell lymphoma Stage 4-A, which means, as I understand it, it's entered four different parts of my body", Hoppus explained at the time. "I don't know how exactly they determine the four-part of it, but it's entered enough parts of my body that I'm Stage 4, which I think is the highest that it goes. So, I'm Stage 4-A."