Ok, I've not had personal experience with hole-in-the-head with my angels so I can't really say for 100% but the hole on this fish looks a little big to be that.... my opinion so take it for what it's worth. I just don't feel comfortable for calling it that. However, I did find this from the Angelfish Forum II, a member by the name of Ish posted it:
The following information was taken from The Manual of Fish Health, by Dr. Andews, Exell, and Dr. Carrington.
Hole-in-The-Head Disease:
Caused by:
The flagellate protozoan, Hexamita, is usually involved. (This is known as Octomitus).
Obvious symptoms:
Small holes appear in the body, especially the head region, which gradually develop into tubular eruptions. Very often, yellow, cheesy strings of mucus will trail from the lesions, leading some aquarists to believe that their fish are suffering from "worm infestation."
Affected fish often go off their food and develop a hollow-bellied appearance, with pale, stringy feces. Lesions may also develop at the base of the fins and near the lateral line. Somewhat similar symptoms occur in a disease known as "head and lateral line erosion" (HLLE), which often affects marine fish such as surgeonfishes (Acanthuridae).
Occurrence of the disease:
Hexamita often exists as a low-level infection in the intestines of a variety of coldwater and tropical fish, notably affecting cichlids- such as Discus, Angelfish, and Oscars-and gouramis. Such infestations proably do the fish little harm. However, various factors, such as overcrowding, low oxygen levels, and unhygenic conditions, changes in temperature and poor diet, may cause the parasites to multiply and then develop the acute symptoms described above. HLLE may be a complex disease syndrome related to poor diet (lack of Vitamin C), as well as environmental factors.
Treatment and control:
The best way of treating hole-in-the-head disease is with medicated food. Unfortunately, affected fish often stop feeding and it is difficult to mix medicated food on a small scale. Fortunately, there are a few drugs which may be added to the water of the tank. Among these are dimetridazole and metronnidazole, both of which are available only with a veterinary prescription in certain countries. A local veterinarian should be able to assist you in the use and application of these drugs, and it is likely that several repeat treatments will be needed for a successful outcome.
For long-term control, it is important to quarantine all new stock, give appropriate preventative treatment and eliminate the factors which bring on the disease. Usually, HLLE can be successfully treated by offering fresh vegetable matter in the diet and removing activated carbon filteration and any protein skimming.