It's generally normal for cats to shed a lot of fur in the spring, as this is their seasonal shedding period. However, owners should also check their cats for parasites and skin diseases, as these can also cause excessive shedding regardless of the season. The risk of parasite infection increases, especially in spring, so owners must ensure their cats are properly dewormed. 
Reasons for cat shedding
1. Seasonal shedding
When the seasons change from spring to summer and autumn to winter, cats shed and replace their fur to adapt to the changing temperatures. This new fur helps them stay warm and dissipate heat.
2. Nutritional deficiency
If pet owners feed their cats only one type of food for a long time and do not pay attention to supplementing their nutrition, the cats are prone to nutritional imbalances. In particular, if the cats do not get enough nutrition for their fur, they are likely to experience severe hair loss.
3. Parasites or skin diseases
Parasites or ringworm in cats can cause itching and excessive hair loss due to scratching. If your cat has ringworm or similar skin conditions, it's important to take it seriously. You can shave the affected area, apply a skin care product like Meowful Fun, and then apply Woof Meow Skin Selection for skin treatment.