This topic is about a 39-year-old man who has been experiencing increased hair shedding after undergoing a total proctocolectomy, a surgery that involves the complete removal of the large bowel. He is trying to understand the cause of this hair loss and is seeking advice on how to manage it. Here are some insights and suggestions that might help:

1. Hair loss after surgery can often be attributed to temporary conditions like telogen effluvium, which is triggered by the stress of surgery, anesthesia, or hospitalization. This type of hair shedding usually starts 2-3 months after the event and can last for several months, but hair typically regrows once the body recovers.

2. While age can play a role in hair loss, at 39, rapid shedding is more likely related to the trauma of surgery unless there is a strong family history of early balding.

3. Staying well-hydrated is crucial after having the colon removed. It's recommended to drink more than 2 liters of water daily and include electrolytes to replace essential minerals like sodium and potassium. Keep an eye out for signs of dehydration to protect your kidneys.

4. It’s a good idea to get lab tests done to check for any imbalances. Important tests include ferritin/iron levels, zinc, thyroid function, and vitamin D. Low levels of ferritin or vitamin D can contribute to hair shedding, and supplements can often help.

5. Consider taking general hair-support supplements such as biotin, multi-vitamin hair formulas, or over-the-counter hair growth blends.

6. For topical treatments, some people have found success with:
- Rosemary oil or rosemary-based creams.
- Anti-fall treatments like ISDIN Lambdapil or L’Oréal Elvive Fall Defense.
- Minoxidil solution or foam, but this should be used under medical supervision.

7. Be gentle with your hair care routine. Avoid using hot blow-dryers, tight hairstyles, and harsh chemicals. You might also consider keeping your hair short until the shedding slows down.

8. Keep in mind that seasonal shedding and the normal hair cycle can also contribute to the perception of hair loss.

9. Many people have reported experiencing heavy shedding after colorectal or ostomy surgeries, and even chemotherapy, but have seen their hair regrow once their health stabilized. This can be reassuring, as it suggests that the condition is usually reversible.